Class 10 Science - Chapter Heredity and Evolution NCERT Solutions | Explain how sexual reproduction gives ri
Explain how sexual reproduction gives rise to more viable variations than asexual reproduction. How does this affect the evolution of those organisms that reproduce sexually?
This is true that sexual reproduction give rise to more variations than asexual reproduction.
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Sexual reproduction is responsible for evolution because these two parents are involved in forming a zygote by sharing their equal amount of genetic material to the offspring that confers a variation. More viable variations occur because error can occur in copying of DNA where mutations occur but this is very rare.
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Sexual reproduction provides infinite chances of the new combinations of existing traits in two steps:- first, by the segregation (the formation of gametes by random separation of paternal or maternal chromosomes into the daughter cells. And second, at the time of fertilization by random fusion of male and female gametes to form a zygote.
And in case of asexual reproduction,
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Unlike sexual reproduction, Asexual reproduction is not responsible for the evolution because in this type of reproduction process only one parent is involved to form the daughter cells. Very small or we can say no changes or variations occur in the progeny because the offsprings they gave arise are identical to the parent. And the division process is also different in this, it can occur through budding, binary or multiple fission.
So, we can say that sexual reproduction give rise to more viable variations than asexual reproduction.
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