Question

why the amount of DNA does not get doubled during sexual reproduction???(answer must be in brief)

Answer 1

In sexual reproduction the chromosome of two parents come together there is no copying of cells. so there is only one DNA in the progeny instead of two but there are two chromosomes.

Answer 2

n sexual reproduction the gametes fuse to form zygote, where the gametes are haploid as they are formed by meiosis. when fusion of two haploid gametes take place the zygote formed becomes diploid.thus the DNA during sexual reproduction do not get doubled.

                                                           OR

The male and the female gametes contain only half the number of chromosomes (23).Thus, during the sexual reproduction, when the male and the female gamete merge, the number becomes the normal number of gametes (46) for an individual. Thus, there is no doubling of DNA in sexual reproduction.