heterogametic

adjective Genetics.

1. (of a species or individual organism) having two unlike gametes.

adjective

1. genetics denoting the sex that possesses dissimilar sex chromosomes. In humans and many other mammals it is the male sex, possessing one X-chromosome and one Y-chromosomeCompare homogametic

adj.

1. Producing dissimilar gametes, such as those of human males, who produce two types of spermatozoa, one bearing the X-chromosome and the other bearing the Y-chromosome.