Please explain Accumulation of variation during reproduction.
Answers
Answer:
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Explanation:
Why do fruits, for example, bananas look alike? This is because most of the fruits reproduce asexually, which typically involves only one parent. During asexual reproduction, the genetic makeup of only a single parent is transferred, which is why we do not see much of variation in their physical characteristics. However, we do see slight changes produced because of minor inaccuracies while copying of DNA.
But in sexual reproduction, we see a huge variety amongst organisms because it involves the fusion of genes from both parents. This fusion gives rise to innumerable combinations to the very same gene set resulting in organisms looking different from their parent. The variation that is accumulated, is passed on over the years, which results in noticeable changes from the past few generations. The basis for evolutionary processes is, however, dependant on the selection of variants by environmental factors.
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Answer:
The variations accumulate and pass on to more and more individuals with each generation. The diversity is small in case of asexual reproduction as compared to sexual reproduction as it is caused by only errors of DNA copying mechanism. Variation is important because it causes evolution and is the basis of heredity.