Heterochromatin variation and sex chromosome polymorphism inNesokia indica:a population study
作者:
S.R.V. Rao,
K. Vasantha,
B.K. Thelma,
R.C. Juyal,
S.C. Jhanwar,
期刊:
Cytogenetic and Genome Research
(Karger Available online 1983)
卷期:
Volume 35,
issue 4
页码: 233-237
ISSN:1424-8581
年代: 1983
DOI:10.1159/000131873
出版商: S. Karger AG
数据来源: Karger
摘要:
Nesokia indica, the Indian mole rat, exhibits extensive variability (polymorphism) for the constitutive heterochromatin of the X and Y chromosomes. These polymorphic X and Y types range from a large metacentric chromosome to a small acrocentric one and occur in different frequencies in the population. On the assumption that there is random mating among individuals carrying these various X and Y chromosomes, the population shows Hardy-Weinberg proportions for the genotypes. However, notwithstanding the partial or total loss of constitutive heterochromatin of the X and Y chromosomes in a few individuals, its retention in most of the animals seems obligatory to the population at large. Hence, we suggest that the C-heterochromatin plays a “regulatory” role in the population dynamics of this spec
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