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?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.