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Assertion (A) : A human child bears all the basic features of human beings. Reason (R) : It looks exactly like its parents, showing very little variations.
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.
"Stability of DNA in a species is ensured during sexual reproduction." Justify the statement.
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