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In which group is the female the heterogametic sex, producing two kinds of gametes with respect to sex chromosomes?
AMammals
BDrosophila
CBirds
DGrasshoppers
Answer & Solution
Correct answer: A. Mammals
Birds follow the ZW system. Females are ZW (heterogametic) and males are ZZ. The other listed groups have male heterogamety.
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