What is meant by production of variations in next generation?
Answers
Answer:
However, recombination by itself does not produce variation unless alleles are ... in the next generation, the frequency of a alleles would be only 1.0 ...
Explanation:
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Answer:
Explanation:
The variational theory of evolution has a peculiar selfdefeating property. If evolution occurs by the differential reproduction of different variants, we expect the variant with the highest rate of reproduction eventually to take over the population and all other genotypes to disappear. But then there is no longer any variation for further evolution. The possibility of continued evolution therefore is critically dependent on renewed variation.
For a given population, there are three sources of variation: mutation, recombination, and immigration of genes. However, recombination by itself does not produce variation unless alleles are segregating already at different loci; otherwise there is nothing to recombine. Similarly, immigration cannot provide variation if the entire species is homo-zygous for the same allele. Ultimately, the source of all variation must be mutation.