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What are chromosomes ?
Explain in brief how stability of DNA content of a species is ensured in sexually reproducing organisms ?
Explain how the original number of chromosomes present in the parents are restored in the progeny. Name the cell division by which chromosome number is maintained in the progeny.
Explain how equal genetic contribution of male and female parents is ensured in the progeny.
The survival of a species is promoted through creation of variations. Illustrate with an example.
Offsprings formed as a result of sexual reproduction produce more variations because
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