This is how a son or daughter is born : ऐसे होता है पुत्र या पुत्री का जन्म
Lifestyle. In the reproductive process, a man’s sperm and a woman’s egg each contribute one sex chromosome. A child’s biological sex (male or female) is determined by the chromosomes contributed by the male parent. Males have XY sex chromosomes while females have XX sex chromosomes. Males can contribute X or Y chromosomes. while females must […]
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