arguments are presented here against the case that frequent differences between species in their sex chromosomes are based on ( i ) different average rates of differentiation of sex-linked and autosomal loci or ( ii ) the fact that the x and y chromosomes are less numerous than autosomal chromosomes and so are more subject to the effects of drift and the random fixation of chromosome rearrangements .
C1708726
loci
C0008633
chromosomes