کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2825252 1161923 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The different levels of genetic diversity in sex chromosomes and autosomes
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی ژنتیک
پیش نمایش صفحه اول مقاله
The different levels of genetic diversity in sex chromosomes and autosomes
چکیده انگلیسی

Sex chromosomes and autosomes differ in their effective population size, mutation and demography, all of which affect the relative level of genetic diversity within the genome. Moreover, natural selection acts differentially on the two chromosomal categories, for example, because recessive mutations are directly exposed to selection on the single X chromosome of males. Recent genome analyses reveal a heterogeneous picture of the sex-chromosome-to-autosome diversity ratio in different organisms. Reduced X chromosome diversity has been interpreted to reflect demographic features such as bottlenecks and male-biased dispersal, whereas more equal diversity in sex chromosomes and autosomes has been explained by polygynous mating systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 25, Issue 6, June 2009, Pages 278–284
نویسندگان
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