Heterogametic

adjective

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.
2. Of or relating to heterogametes.
3. That produces heterogametes
4. That produces different forms of the same gamete e.g. spermatozoa containing either an X- or a Y-chromosome.