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Which chromosome combination produces a boy in humans?

Answer and explanation

Correct answer: XY

The governing concept is the human sex-chromosome system. A typical human female has XX sex chromosomes, while a typical human male has XY. The egg contributes X, and a Y-bearing sperm contributes Y, producing the XY combination. Therefore, option B is correct. XX is the usual female combination; YY is not a viable normal human combination, and a single X does not represent the usual diploid chromosome state.

Related tags

Sex ChromosomesXySex DeterminationHuman BiologyHeredity And EvolutionScienceClass 10 Mcq

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