Home › CBSE Class 12 › Biology › Principles Of Inheritance › The sex of a human baby is determined by:
The sex of a human baby is determined by:
AThe mother's egg cell which has different types
BHormones during prenatal development phase
CThe X or Y chromosome contributed by the father
DRandom environmental factors during gestation
Answer & Solution
Correct answer: C. The X or Y chromosome contributed by the father
Father is XY: he contributes either X (→ XX daughter) or Y (→ XY son). Mother always contributes X. So father determines the baby's sex.
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