Question
Biology Question on Principles of Inheritance and Variation
Heterogamety or formation of two types of gametes is found in
A
Male Drosophila
B
Female bird
C
Female Drosophila
D
Both A and B
Answer
Both A and B
Explanation
Solution
The phrase ‘Heterogamety’ is used when an individual produces two types of gametes. Depending upon the sex-determination mechanism in the particular species, either males or females are the heterogametic sex that produces two different types of gametes.
- In Drosophila, a female has the XX genotype and a male has the XY genotype.
- In birds, the female has the ZW genotype and males have the ZZ genotype.
Hence, option (D) is correct Both A and B.
Heterogamety or formation of two types of gametes is found in both Male Drosophila and Female Bird.