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प्रश्न
At what stage of reproduction is the sex of a child determined in humans?
पर्याय
During oogenesis
During embryonic development
At the moment of fertilization
During spermatogenesis
MCQ
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उत्तर
The sex of a child is determined at the moment of fertilization when a sperm fuses with an egg. The sperm type (X-bearing or Y-bearing) determines whether the resulting zygote will be XX (female) or XY (male). This occurs immediately upon fusion of the gametes.
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