Is selection responsible for the low level of variation in the last intron of the ZFY locus?

Abstract excerpt

DNA variability was investigated in the last intron of the Y-chromosome-specific zinc finger gene, ZFY, and its X homolog on Xp21.3, ZFX. No polymorphisms were found in the 676-bp ZFY segment in a sample of 205 world-wide-distributed Y chromosomes, other than a solitary nucleotide variant in one individual (nucleotide diversity pi = 0.0014%). In contrast, 10 segregating sites (pi = 0.082%) were identified within...

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