alleryIn birds, the sex-determination mechanism is:
AXX-XO type
BZW type with female heterogamety (females ZW, males ZZ)
CHaplodiploid
DXY type with female heterogamety
Answer & Solution
Correct answer: B. ZW type with female heterogamety (females ZW, males ZZ)
**Birds:** **ZW type, female heterogamety**.
Females are **ZW** (two different sex chromosomes), males are **ZZ** (homogametic).
So in birds the **female determines the sex of the offspring**.
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