What are chromosome? Explain how is sexual reproduce organisms the number of chromosomes in the progeny is maintained?
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there are 23 oairs of chromosomes in human nuclei
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Chromosomes are the thread like structures present in nucleus of a cell.In sexually reproducing organisms, the gametes undergo meiosis, and hence, each gamete contains only half a set of chromosomes. When two gametes fuse, the zygote formed contains the full set of chromosomes. Hence, the formation of gametes by meiosis helps to maintain the number of chromosomes in the progeny.
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