Question:
what happens to the chromosomes when a second child is born . from where the mother and father will contribute 23 pair of chromosomes each
Answer:
This happens during fertilisation. The sperm of the father and the egg of the mother has 23 chromosomes each. When fertilisation happens, the sperm and the egg fuses together and produces a zygote which has 46 chromosomes and is a diploid. This then undergoes several cycles of cell division and differentiation and produces a foetus which eventually develops into a new born.
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