Question Detail

Homogametic means producing gametes with the same sex chromosome. In humans, females are homogametic (all eggs carry an X chromosome). Males are heterogametic (sperm carry X or Y). In butterflies and birds, the female is heterogametic (ZW) and male is homogametic (ZZ). So the only homogametic option here is Male human? Wait, male human is heterogametic. The question asks 'which is homogametic?' A. Male human - heterogametic. B. Female butterfly - heterogametic (ZW). C. Male Drosophila - heterogametic? No, Drosophila also has XY system, male is XY, heterogametic. D. Male birds - homogametic (ZZ). So D is correct. Male birds are homogametic.