Relevant bibliographies by topics / Chromosome variation

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Chromosome variation'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Chromosome variation"

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Traldi, Josiane, Marcelo Vicari, Daniel Blanco, Juliana Martinez, Roberto Artoni, and Filho Orlando Moreira. "First karyotype description of Hypostomus iheringii (Regan, 1908): a case of heterochromatic polymorphism." Comparative Cytogenetics 6, no. (2) (2012): 115–25. https://doi.org/10.3897/compcytogen.v6i2.2595.

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In this study, which is the first karyotype analysis of <i>Hypostomus iheringii,</i> nine specimens collected in Córrego da Lapa (tributary of the Passa-Cinco River) showed a diploid number of 80 chromosomes. Silver nitrate staining and fluorescence <i>in situ</i> hybridization (FISH) with an 18S rDNA probe revealed the presence of multiple nucleolus organizer regions (NORs) (chromosome pairs 13, 20, and 34). FISH with a 5S rDNA probe showed that this cistron was only present in chromosome pair 2. When the karyotypes of individual animals were compared, unique heterochromatic polymorphisms wer
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Ocalewicz, K., and S. Dobosz. "Karyotype variation in the albino rainbow trout (Oncorhynchus mykiss (Walbaum))." Genome 52, no. 4 (2009): 347–52. http://dx.doi.org/10.1139/g09-009.

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A Robertsonian polymorphism resulting in diploid chromosome number ranging from 59 to 61 and constant chromosome arm number (fundamental number = 104) was observed in the albino rainbow trout ( Oncorhynchus mykiss (Walbaum)) from the yellow color strain. In one individual, 90 mitotic chromosomes and 156 chromosome arms were counted, indicating the fish as a triploid. Morphology of the chromosomes, DAPI staining, and the cytogenetic location of 5S rDNA sequences showed sex-related chromosomal heteromorphism in the specimens. Additionally, length polymorphism of the X chromosome was detected in
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Bardella, Vanessa Bellini, Hélcio Reinaldo Gil-Santana, Francisco Panzera, and André Luís Laforga Vanzela. "Karyotype diversity among predatory Reduviidae (Heteroptera)." Comparative Cytogenetics 8, no. (4) (2014): 351–67. https://doi.org/10.3897/CompCytogen.v8i4.8430.

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Species of infraorder Cimicomorpha of Heteroptera exhibit holokinetic chromosomes with inverted meiosis for sex chromosomes and high variation in chromosome number. The family Reduviidae, which belongs to this infraorder, is also recognized by high variability of heterochromatic bands and chromosome location of 18S rDNA loci. We studied here five species of Reduviidae (Harpactorinae) with predator habit, which are especially interesting because individuals are found solitary and dispersed in nature. These species showed striking variation in chromosome number (including sex chromosome systems)
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Dewitte, Angelo, Leen Leus, Tom Eeckhaut, Ives Vanstechelman, Johan Van Huylenbroeck, and Erik Van Bockstaele. "Genome size variation in Begonia." Genome 52, no. 10 (2009): 829–38. http://dx.doi.org/10.1139/g09-056.

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The genome sizes of a Begonia collection comprising 37 species and 23 hybrids of African, Asiatic, Middle American, and South American origin were screened using flow cytometry. Within the collection, 1C values varied between 0.23 and 1.46 pg DNA. Genome sizes were, in most cases, not positively correlated with chromosome number, but with pollen size. A 12-fold difference in mean chromosome size was found between the genotypes with the largest and smallest chromosomes. In general, chromosomes from South American genotypes were smaller than chromosomes of African, Asian, or Middle American geno
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Luo, Xiao-Yu, Tang-Jie Nie, Heng Liu, et al. "Karyotype and genome size variation in Delphinium subg. Anthriscifolium (Ranunculaceae)." PhytoKeys 234 (October 18, 2023): 145–65. http://dx.doi.org/10.3897/phytokeys.234.108841.

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Five taxa of Delphinium subg. Anthriscifolium have been karyologically studied through chromosome counting, chromosomal measurement, and karyotype symmetry. Each taxon that we investigated has a basic chromosome number of x = 8, D. anthriscifolium var. savatieri, D. anthriscifolium var. majus, D. ecalcaratum, and D. callichromum were diploid with 2n = 16, while D. anthriscifolium var. anthriscifolium was tetraploid with 2n = 32. Monoploid chromosome sets of the investigated diploid taxa contained 1 metacentric chromosome, 3 submetacentric chromosomes, and 4 subtelocentric chromosomes. Higher i
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Miyashita, Naohiko, Cathy C. Laurie-Ahlberg, Alan N. Wilton, and Ted H. Emigh. "QUANTITATIVE ANALYSIS OF X CHROMOSOME EFFECTS ON THE ACTIVITIES OF THE GLUCOSE 6-PHOSPHATE AND 6-PHOSPHOGLUCONATE DEHYDROGENASES OF DROSOPHILA MELANOGASTER." Genetics 113, no. 2 (1986): 321–35. http://dx.doi.org/10.1093/genetics/113.2.321.

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ABSTRACT By combining 20 X chromosomes with five autosomal backgrounds, the relative importance of these factors with respect to the activity variations of G6PD and 6PGD in Drosophila melanogaster were investigated. Analysis of variance revealed that there exist significant X chromosome, autosomal background and genetic interaction effects. The effect of the X chromosome was due mainly to the two allozymic forms of each enzyme, but some within-allozyme effects were also detected. From the estimated variance components, it was concluded that the variation attributed to the autosomal background
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Malleret, Matías, Carolina Labaroni, Gabriela Verónica García, Juan Ferro, Dardo Andrea Marti, and Cecilia Lanzone. "Chromosomal variation in Argentine populations of Akodon montensis Thomas, 1913 (Rodentia, Cricetidae, Sigmodontinae)." Comparative Cytogenetics 10, no. (1) (2016): 129–40. https://doi.org/10.3897/CompCytogen.v10i1.6420.

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The genus Akodon Meyen, 1833 is one of the most species-rich among sigmodontine rodents and has great chromosome variability. Akodon montensis has a relatively broad distribution in South America, and Argentine populations are located in the southernmost region of its range. Brazilian populations have important chromosomal variability, but cytogenetic data from Argentina are scarce. We performed a chromosome characterization of natural populations of A. montensis using conventional staining, C-banding, Ag-NORs and base-specific fluorochromes. A total of 31 specimens from five localities of Mis
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Rovatsos, Michail, Juan Alberto Marchal, Eva Giagia-Athanasopoulou, and Antonio Sánchez. "Molecular Composition of Heterochromatin and Its Contribution to Chromosome Variation in the Microtus thomasi/Microtus atticus Species Complex." Genes 12, no. 6 (2021): 807. http://dx.doi.org/10.3390/genes12060807.

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The voles of the Microtus thomasi/M. atticus species complex demonstrate a remarkable variability in diploid chromosomal number (2n = 38–44 chromosomes) and sex chromosome morphology. In the current study, we examined by in situ hybridization the topology of four satellite DNA motifs (Msat-160, Mth-Alu900, Mth-Alu2.2, TTAGGG telomeric sequences) and two transposons (LINE, SINE) on the karyotypes of nine chromosome races (i.e., populations with unique cytogenetic traits) of Microtus thomasi, and two chromosomal races of M. atticus. According to the topology of the repetitive DNA motifs, we were
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Neeru, Neeru, Anita Bhatnagar, and Abhay Singh Yadav. "A study of constitutive heterochromatin and NOR banding in three species of Indian major carps from the State of Haryana, India." Journal of Applied and Natural Science 10, no. 2 (2018): 535–39. http://dx.doi.org/10.31018/jans.v10i2.1731.

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Cytogenetic survey of fishes becomes increasingly important to establish chromosomal relation between the teleosts, to have a glimpse of the relation between chromosomal evolution and differentiation of vertebrate species. In the present study, Chromosome banding studies was done in three species of carps i.e. Catla catla (Hamilton, 1822), Labeo rohita (Hamilton, 1822) and Cirrhinus mrigala (Hamilton, 1822). Diploid chromosome number 50 was observed in all 3 species of carps. The chromosomes of C. catla, L. rohita and C. mrigala showed constitutive heterochromatin at telomeric and centromeric
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Rovatsos, Michail T., Juan A. Marchal, Ismael Romero-Fernández, Maria Arroyo, Eva B. Athanasopoulou, and Antonio Sánchez. "Extensive Sex Chromosome Polymorphism of Microtus thomasi/Microtus atticus Species Complex Associated with Cryptic Chromosomal Rearrangements and Independent Accumulation of Heterochromatin." Cytogenetic and Genome Research 151, no. 4 (2017): 198–207. http://dx.doi.org/10.1159/000477114.

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The sibling species Microtus thomasi and M. atticus represent probably the highest karyotypic diversity within the genus Microtus and are an interesting model for chromosomal evolution studies. In addition to variation in autosomes, they show a high intraspecific variation in the size and morphology of both sex chromosomes. We analyzed individuals with different sex chromosome constitutions using 3 painting probes, 2 from Y chromosome variants and 1 from the small arm of the submetacentric X chromosome. Our comparative painting approach uncovered 12 variants of Y and 14 variants of X chromosom
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Dissertations / Theses on the topic "Chromosome variation"

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Gregory, Simon Gray. "Chromosome 1 map, sequence and variation." Thesis, Open University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272971.

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Carr, Martin. "Genetic variation on the fourth chromosome of Drosophila melanogaster." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324481.

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Anagnostopoulos, Theodore. "Investigation of sequence variation on the human X chromosome." Thesis, King's College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405805.

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SSEKIMPI, PUPULIO SSEMOMBWE NKUNA ABBY. "CHROMOSOME VARIATION IN DROSOPHILA SPECIES OF THE MULLERI COMPLEX." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183809.

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Drosophila species in mulleri complex show five rod-shaped and one pair of dot-shaped chromosome. The sex-chromosomes represent the largest pair in the female, but are heteromorphic in the male, the Y-chromosome being shorter than the X-chromosome. The purpose of the research presented here is to determine whether chromosomes in the mulleri cluster species are longer than in the mojavensis cluster. The length of X-, Y-chromosomes and the rod-like autosomes were compared among the ten species studied. All the rod-like chromosomes were measured in 30 or more brain cells in each of the ten specie
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Stavrides, George Stavros. "Human chromosome 20q12-13.2 : structural, comparative and sequence variation studies." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619575.

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Rootsi, Siiri. "Human Y-chromosomal variation in European populations /." Tartu : Tartu University Press, 2004. http://dspace.utlib.ee/dspace/bitstream/10062/1252/5/rootsi.pdf.

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Plaster, C. A. "Variation in Y chromosome, mitochondrial DNA and labels of identity on Ethiopia." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1331901/.

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There is a paucity of genetic studies of Ethiopia. This thesis aims to establish the extent and distribution of variation in NRY and mtDNA genetic markers as well as ethnic and linguistic labels of identity 45 ethnic groups. A wide range of NRY and mtDNA haplogroups were observed, including both those typically observed in Africa and those more frequently observed outside Africa. Significant correlations were revealed between NRY and mtDNA diversity. Nearly all ethnic groups were significantly differentiated from each other, although the pattern of similarities indicates some recent gene flow
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Lu, Wenqing. "Phenotypic impact of inversions in yeast genome." Electronic Thesis or Diss., Sorbonne université, 2021. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2021SORUS514.pdf.

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Les génomes sont des structures hautement dynamiques et les grandes variations structurelles (SVs) des chromosomes, telles que les inversions, contribuent à l'évolution des génomes et à l'adaptation des espèces. Il est essentiel de comprendre l'impact fonctionnel des inversions sur la diversité phénotypique, car il existe de plus en plus de preuves que les inversions joueraient un rôle important dans les variations phénotypiques. Afin d'expliquer l'impact phénotypique des inversions, nous avons choisi la levure de boulangerie comme modèle eucaryote unicellulaire dans notre travail. Sur la base
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Ferreira, Irma. "Sequence variation of the amelogenin gene on the Y-chromosome / by Irma Ferreira." North-West University, 2010. http://hdl.handle.net/10394/4412.

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The accurate determination of gender of biological samples has valuable applications in medical and forensic investigations. Gender determination based on length variations in the X-Y homologous amelogenin gene, is part of most commercial multiplex DNA profiling kits. The first report of a failure of the amelogenin sex test was in 1998 when two normal males were typed as female. Subsequently, several amelogenin Y (AMELY) negative males have been reported. This study represents the first report of this phenomenon in the black South African population. This study determined the size of t
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Latham, Krista Erin. "Assessing Y-Chromosome Variation in the South Pacific Using Newly Detected NRY Markers." Diss., Temple University Libraries, 2008. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/5736.

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Anthropology<br>Ph.D.<br>The South Pacific is a region of incredible biological, cultural and linguistic diversity, reflecting its early settlement by human populations. It has been a region of interest to scholars because of this diversity, as well as its unique geography and settlement history. Current evidence suggests there was an initial settlement of Near Oceania during the Pleistocene by Papuan-speaking foragers, followed by a later Holocene settlement of Remote Oceania by Oceanic-speaking agriculturalists. Previous studies of human biological variation have been used to illuminate the
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Books on the topic "Chromosome variation"

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Wyandt, Herman E., and Vijay S. Tonk. Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-0896-9.

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Wyandt, Herman E. Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Science+Business Media B.V., 2012.

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Wyandt, Herman E., Golder N. Wilson, and Vijay S. Tonk. Human Chromosome Variation: Heteromorphism, Polymorphism and Pathogenesis. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3035-2.

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Max, King. Species evolution: The role of chromosome change. Cambridge University Press, 1993.

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Khazanehdari, Kamal Aldin. Meiotic chromosome behaviour and somatic chromosome variation in the leek (Allium porrum L.). University of Birmingham, 1995.

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Jaarola, Maarit. Colonization history of Fennoscandian field voles (Microtus agrestis): Geographic structure of mitochondrial DNA and Y chromosome variation. Uppsala University, 1995.

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Khattak, Mohammad Naeem. Chromosomal DNA variations in infections. University of Manchester, 1993.

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1956-, Kwok Pui-Yan, ed. Single nucleotide polymorphisms: Methods and protocols. Humana Press, 2003.

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Lloyd, Davina. The induction, in vitro, of chromosomal variation in Rosa. NELP, 1986.

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Bear, Greg. Darwin's children. Ballantine, 2003.

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Book chapters on the topic "Chromosome variation"

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 5." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_10.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 6." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_11.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 7." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_12.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 8." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_13.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 9." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_14.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 10." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_15.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 11." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_16.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 12." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_17.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 13." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_18.

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Wyandt, Herman E., and Vijay S. Tonk. "Chromosome 14." In Human Chromosome Variation: Heteromorphism and Polymorphism. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0896-9_19.

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Conference papers on the topic "Chromosome variation"

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Lutze, Margaret, Nancy J. Cox, and Curtis R. Brandt. "Normal color vision, linkage analysis, and visual pigment genes." In OSA Annual Meeting. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.fm5.

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People with normal color vision show interobserver variation in Rayleigh and red-green photometric matches, which may indicate variations in photopigment spectral sensitivities and receptor populations, respectively. We have previously shown that this variation is consistent with single-gene determination. The X-chromosome visualpigment genes are good candidate genes for determination of variation in these color-vision traits; however, other genes may also contribute to cone development and function, which affect these measures.
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Shi, Jianxin, Nilanjan Chatterjee, Melissa Rotunno, et al. "Abstract 2931: Inherited variation at chromosome 12p13.33 includingRAD52influences squamous cell lung carcinoma risk." In Proceedings: AACR 103rd Annual Meeting 2012‐‐ Mar 31‐Apr 4, 2012; Chicago, IL. American Association for Cancer Research, 2012. http://dx.doi.org/10.1158/1538-7445.am2012-2931.

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Siti Hajar Noor Alshurdin, Farida Zuraina Mohd Yusof, Wan Nurhayati Wan Hanafi, and Rita Rohaiza Sohari. "Tracing human origin among Orang Asli population in Taman Negara through Y-chromosome variation." In 2011 IEEE Colloquium on Humanities, Science and Engineering (CHUSER). IEEE, 2011. http://dx.doi.org/10.1109/chuser.2011.6163866.

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Lutze, Margaret, Curtis R. Brandt, Vivianne C. Smith, Joel Pokorny, and Ron G. Gregg. "Genetic studies of normal color vision." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.fa3.

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We have studied the familial transmissions of Rayleigh match midpoints and photometric matches (667-551 nm) in observers with normal color vision to assess genetic bases for these two color vision traits (Lutze et al., in press). We first employed segregation analysis to evaluate whether each trait was consistent with determination by allelic variation of a single gene, by multiple genes (polygenic), or by environmental factors. We found that each trait was consistent with determination by a single gene. Blood samples were obtained from the majority of family members tested and DNA was isolate
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Zaccaron, Alex. "Impact of genomic structural variations on virulence of the tomato pathogen Cladosporium fulvum." In IS-MPMI Congress. IS-MPMI, 2023. http://dx.doi.org/10.1094/ismpmi-2023-1.

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Cladosporium fulvum causes tomato leaf mold and has been extensively used in the past as a model species to study plant-microbe interactions. Although the first chromosome-scale reference genome of the fungus was released in 2022, still little is known about how its genome architecture and structural variations (SVs) thereof impact its virulence. In this study, we used PacBio HiFi to sequence the genomes of four additional C. fulvum isolates and further assembled them at chromosome level. Comparative genome analyses revealed high chromosomal synteny among the five isolates, and a set of 13 cor
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Wei, Chongjuan, Marsha Frazier, Issac Wun, and Chris Amos. "Abstract A125: Genetic variation in nicotinic acetylcholine receptor region on chromosome 15q25 and lung cancer risk." In Abstracts: AACR International Conference on Frontiers in Cancer Prevention Research‐‐ Dec 6–9, 2009; Houston, TX. American Association for Cancer Research, 2010. http://dx.doi.org/10.1158/1940-6207.prev-09-a125.

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Neitz, Jay, and Gerald H. Jacobs. "Systematic variations in color matching among normal humans." In OSA Annual Meeting. Optica Publishing Group, 1985. http://dx.doi.org/10.1364/oam.1985.tuj6.

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There is evidence suggesting that the spectral positioning of cone photopigments varies among individuals with normal color vision. To examine this we obtained Rayleigh matches from 200 young (mean age = 20.6 yrs) color-normal individuals using large field substitution, a method which enhances color discrimination. The results reveal a discrete variation in color matches between individuals and a striking difference between males and females. The color matches made by males fall into two distributions nearly equal in size. The color matches of the females are trimodally distributed: two modes
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Wolff, BM, YG Oliveira, VT Almeida, et al. "CYTOGENOMIC DELINEATION OF A RARE 15Q TRIPLICATION CASE." In Resumos do 54º Congresso Brasileiro de Patologia Clínica/Medicina Laboratorial. Zeppelini Editorial e Comunicação, 2022. http://dx.doi.org/10.5327/1516-3180.140s1.5930.

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Objective: The proximal long arm of human chromosome 15 is frequently involved in molecular rearrangements including duplications, deletions, triplications, translocations, and inversions, as well as in the formation of supernumerary marker chromosomes. It happens due to the presence of low copy repeats (LCR), which mediate non-allelic homologous recombination (NAHR), resulting in these genomic rearrangements. In this study, we made a molecular characterization of the patient and his family. Method: We report a 14-year-old boy, the product of healthy and nonconsaguineous couple who has an intr
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Cuciumita, Cleopatra F., Valeriu A. Vilag, Valentin Silivestru, and Ionut Porumbel. "Genetic Algorithm for Gas Turbine Blading Design." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-46171.

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Designing a gas turbine from scratch has always been an extremely laborious task in terms of obtaining the desired power output and efficiency. Theoretical prediction of the performances of a gas turbine has proven in time to be a compromise between accuracy and simplicity of the calculus. Methods such as the Smith chart are very easy to apply, but to make an exact prediction of the flow in a turbine would lead to an almost infinite number of variables to be considered. A quite precise method of determining total-loss coefficients for a gas turbine, based on a large number of turbine tests, wa
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Kozyreva, S. Yu, M. M. Gridina, A. A. Torgasheva, V. S. Fishman, K. S. Zadesenets, and L. P. Malinovskaya. "DISSECTING THE STRUCTURE OF THE CHROMOSOMAL REARRANGEMENTS IN CHROMOSOME 1A IN GREAT TITS (PARUS MAJOR) USING HI-C TECHNIQUE." In OpenBio-2023. ИПЦ НГУ, 2023. http://dx.doi.org/10.25205/978-5-4437-1526-1-21.

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Polymorphism caused by complex rearrangement on chromosome 1A has been identified in the population of the Great Tit (Parus major). Сhromosomal rearrangement involves large inversion and regions with copy number variations, potentially spanning around 3.5 Mb. Using Hi-C technique we determined the inversion breakpoints with an accuracy of 1000 bp and developed an approach that allowed to discover additional 15 Mb of genomic sequences in the rearranged chromosome.
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Reports on the topic "Chromosome variation"

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Weller, Joel I., Derek M. Bickhart, Micha Ron, Eyal Seroussi, George Liu, and George R. Wiggans. Determination of actual polymorphisms responsible for economic trait variation in dairy cattle. United States Department of Agriculture, 2015. http://dx.doi.org/10.32747/2015.7600017.bard.

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The project’s general objectives were to determine specific polymorphisms at the DNA level responsible for observed quantitative trait loci (QTLs) and to estimate their effects, frequencies, and selection potential in the Holstein dairy cattle breed. The specific objectives were to (1) localize the causative polymorphisms to small chromosomal segments based on analysis of 52 U.S. Holstein bulls each with at least 100 sons with high-reliability genetic evaluations using the a posteriori granddaughter design; (2) sequence the complete genomes of at least 40 of those bulls to 20 coverage; (3) de
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Howlett, Niall G. De Novo Chromosome Copy Number Variation in Fanconi Anemia-Associated Hematopoietic Defects. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada563377.

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Howlett, Niall G. De Novo Chromosome Copy Number Variation in Fanconi Anemia-Associated Hematopoietic Defects. Defense Technical Information Center, 2013. http://dx.doi.org/10.21236/ada586051.

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Dubcovsky, Jorge, and T. (Tzion) Fahima. Validation of candidate genes for a QTL responsible for water stress tolerance and their diversity in wheat. United States-Israel Binational Agricultural Research and Development Fund, 2022. http://dx.doi.org/10.32747/2022.8134149.bard.

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The main goals of this project as stated in the original proposal were to identify which of the candidate gene(s) identified in a 1.5 Mb region of wheat and rye chromosomes 1RS and 1BS were responsible for the differences in root architecture, reveal their natural variation and characterize the epistatic interactions that modulate their effect in different backgrounds. Background: Wheat is an essential crop for global food security and is well adapted to a wide variety of soils. However, the gene networks regulating different wheat root architectures remain poorly understood. Root depth and bi
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Kistler, Harold Corby, Talma Katan, and Dani Zamir. Molecular Karyotypes of Pathogeic Strains of Fusarium oxysporum. United States Department of Agriculture, 1995. http://dx.doi.org/10.32747/1995.7604927.bard.

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Genetic diversity of pathogenic strains of the fungus Fusarium oxysporum was determied by analysis of electrophoretic karyotype, as well as by DNA variation detected by Restriction Fragment Length Polymorphisms (RFLPs) and Random Amplified Polymorphic DNAs (RAPDs). The electrophoretic karyotypes for 130 isolates of the fungus pathogenic to tomato, melon, and banana were analyzed. Electrophoretic karyotype variation, reflected in differences in apparent chromosome number and genome size, was observed even among isolates from the same host and sub specific category. Sub specific categories studi
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Rocheford, Torbert, Yaakov Tadmor, Robert Lambert, and Nurit Katzir. Molecular Marker Mapping of Genes Enhancing Tocol and Carotenoid Composition of Maize Grain. United States Department of Agriculture, 1995. http://dx.doi.org/10.32747/1995.7571352.bard.

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The overall objective of this research was to identify chromosomal regions and candidate genes associated with control of concentration and forms of carotenoids (includes pro-Vitamin A) and tocopherols (Vitamin E), which are both antioxidants and are associated with health advantages. Vitamin A and E are included in animal feeding supplements and the eventual goal is to increase levels of these compounds in maize grain so that the cost of these supplements can be reduced or eliminated. Moreover, both compounds are antioxidants that protect unsaturated fatty acids from oxidation and thus mainta
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Dubcovsky, Jorge, Tzion Fahima, Ann Blechl, and Phillip San Miguel. Validation of a candidate gene for increased grain protein content in wheat. United States Department of Agriculture, 2007. http://dx.doi.org/10.32747/2007.7695857.bard.

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High Grain Protein Content (GPC) of wheat is important for improved nutritional value and industrial quality. However, selection for this trait is limited by our poor understanding of the genes involved in the accumulation of protein in the grain. A gene with a large effect on GPC was detected on the short arm of chromosome 6B in a Triticum turgidum ssp. dicoccoides accession from Israel (DIC, hereafter). During the previous BARD project we constructed a half-million clones Bacterial Artificial Chromosome (BAC) library of tetraploid wheat including the high GPC allele from DIC and mapped the G
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Levin, Ilan, John Thomas, Moshe Lapidot, Desmond McGrath, and Denis Persley. Resistance to Tomato yellow leaf curl virus (TYLCV) in tomato: molecular mapping and introgression of resistance to Australian genotypes. United States Department of Agriculture, 2010. http://dx.doi.org/10.32747/2010.7613888.bard.

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Tomato yellow leaf curl virus (TYLCV) is one of the most devastating viruses of cultivated tomatoes. Although first identified in the Mediterranean region, it is now distributed world-wide. Sequence analysis of the virus by the Australian group has shown that the virus is now present in Australia. Despite the importance of the disease and extensive research on the virus, very little is known about the resistance genes (loci) that determine host resistance and susceptibility to the virus. A symptom-less resistant line, TY-172, was developed at the Volcani Center which has shown the highest resi
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Fallik, Elazar, Robert Joly, Ilan Paran, and Matthew A. Jenks. Study of the Physiological, Molecular and Genetic Factors Associated with Postharvest Water Loss in Pepper Fruit. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7593392.bard.

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The fruit of pepper (Capsicum annuum) commonly wilts (or shrivels) during postharvest storage due to rapid water loss, a condition that greatly reduces its shelf life and market value. The fact that pepper fruit are hollow, and thus have limited water content, only exacerbates this problem in pepper. The collaborators on this project completed research whose findings provided new insight into the genetic, physiological, and biochemical basis for water loss from the fruits of pepper (Capsicum annuum and related Capsicum species). Well-defined genetic populations of pepper were used in this stud
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Singh, Anjali. Estimating the Chiasma Frequency in Diplotene-Diakinesis Stage. ConductScience, 2020. http://dx.doi.org/10.55157/cs20200925.

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Chiasma is the point of crossing over or site where the exchange of genetic material takes place between two homologous, non-sister chromatids. The crossover occurs in the pachytene stage, however, it is observed in the diplotene stage of meiosis-I[2]. The cross-over between the two homologs also creates a new combination of parental genes, forming recombinants. The recombination of the genes causes variation in the population and exert a profound effect on genomic diversity and evolution. Meiotic recombination and variation in the population have been a concern for scientists to understand th
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