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If a child has XY chromosomes how must this combination have formed?

Answer and explanation

Correct answer: X came from the mother and Y came from the father

The governing concept is the inheritance of sex chromosomes in the XX–XY system. The egg from the mother contributes X, because human eggs normally carry X. A sperm from the father contributes either X or Y. An XY child must therefore receive X from the mother and Y from the father. Option A is correct; the mother does not normally provide Y, and neither parent can provide both chromosomes through one gamete.

Related tags

Xy ChromosomesSex DeterminationMaleHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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