Heterogametic sex The sex with dissimilar sex chromosomes, one (in mammals the Y chromosome)being shorter than the other(the X chromosome).
Heterogametic sex The sex with dissimilar sex chromosomes, one (in mammals the Y chromosome)being shorter than the other(the X chromosome).
异配性别：具有不相同的性染色体，一条（哺乳类中为Y染色体）比另一条（X染色体）短一些。