Question

Does natural selection always result in evolution?

Answer 1

Natural selection may not always leads to evolution. Natural selection can sometimes defined as a change in the frequency of alleles in a population due to selection.If the differences among individuals are not genetically based ,it may not lead to evolution.For causing an evolution trait variants must be transmitted from parent to offspring.In this case, the offspring will resemble their parents and the trait variants possesed by the parents that produce more offspring will increase in frequency in the next generation.In some cases , the individuals donot vary phenotypically because they are genetically different.And we conclude that if the variation in a population is not genetically based , then natural selection doesnot leads to evolution.