Chakraborty B M, Chakraborty R
Acta Anthropogenet. 1984;8(3-4):269-75.
A statistical test is proposed to examine the relationship between the mean and variance of the relative length of Y chromosome (as measured by Y/A2 or Y/F indices) in various racial groups. It is shown that the variance of Y chromosome length within a population is quadratically related with its mean if the Y chromosome length variation is caused only by variations in the number of copies of repeated DNA sequences. No such relationship is observed in the available data on relative lengths of the Y chromosome in various racial groups. We thus conclude that the length polymorphism in human Y chromosome may not be solely due to variations in the amount of Y chromosome-specific repeated DNA.
提出了一种统计检验方法，以研究不同种族群体中Y染色体相对长度（以Y/A2或Y/F指数衡量）的均值与方差之间的关系。结果表明，如果Y染色体长度变异仅由重复DNA序列拷贝数的变异引起，那么群体内Y染色体长度的方差与其均值呈二次相关。在不同种族群体Y染色体相对长度的现有数据中未观察到这种关系。因此，我们得出结论，人类Y染色体的长度多态性可能并非仅由Y染色体特异性重复DNA数量的变异所致。
