Answer:
In
sexual reproduction, though the genetic material from a male and female gamete combines
together to form a zygote, the amount of DNA in zygote does not get doubled.
This is because the gametes are reproductive cell which contain only half
the amount of DNA as compared to the parent ceil, So, when a male gamete
combines with a female gamete during sexual reproduction, the zygote formed
will have the normal amount of DNA(i.e., same number of chromosomes as parent).
e.g., if the male gamete has 'n' chromosomes and female
gamete also has 'n' chromosome. So, during fertilization, the zygote formed
will have n + n = 2n chromosomes which is the normal number of chromosomes in
parents.
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