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Why is the chance of a male and female child generally considered nearly equal?

Answer and explanation

Correct answer: Because the two types of sperm are produced with nearly equal probability

In the standard human XX–XY system, every egg contributes X, while sperm are produced as X-bearing or Y-bearing types. If these two types are generated and participate in fertilisation with approximately equal probability, XX and XY zygotes also have approximately equal expected probabilities. This is a population-level expectation, not a guarantee for every family or a result controlled by the mother.

Related tags

Sex-RatioProbabilitySex-ChromosomesSex DeterminationHeredity And EvolutionScienceClass 10 Mcq

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