A) male Drosophifa fly
B) female Drosophila fly
C) female bird
D) Both [a] and [c]
Correct Answer: D
Solution :
[d] Heterogamety is the term used where an individual produces two types of gametes. Depending upon the sex-determination mechanism in the species, either males or females can be heterogametic sex, producing two different types of gametes. In Drosophila female has XX genotype and male has XY genotype. In birds, female has ZW genotype and males have ZZ genotype. Thus, option [d] is correct.
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