Sex Determination in Birds — NEET Biology
📚 Practice ConceptHow is the sex-determination mechanism different in the birds?
Assertion (A): Birds show a different pattern of sex determination compared to mammals. Reason (R): In birds, females have ZZ chromosomes while males have ZW chromosomes.
View solution & NCERT explanation
Correct answer: C — If assertion is true but reason is false.
NCERT confirms birds have different sex determination from mammals (Assertion true). However, NCERT states “females have one Z and one W chromosome, whereas males have a pair of Z-chromosomes” - the Reason swaps the sex chromosome patterns, making it false. This tests knowledge of ZW sex determination system.
What does NCERT say about How sex-determination mechanism different?
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