Question

Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?​

Answer 1

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Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?

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In the case of the asexually reproducing organism, geographical isolation can’t be serious. Consider evolution as a result of meiosis which doesn’t happen throughout reproduction. Also, reproduction includes single parent. Therefore there are terribly rare possibilities of variation and while not variation there can’t be evolution.

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Answer 2

$\implies$Geographical isolation is a major factor in the speciation of organisms that reproduce sexually because it interrupts with gene flow.

$\implies$In most of the cases, gene flow must be stopped so that sub-populations become genetically isolated.

$\implies$Changes in allele and genotype frequencies within the populations, as a result of the effect of natural selection on the range of phenotypes produced by mutation and sexual recombination, lead to the formation of races and subspecies.

$\implies$Geographical isolation may not have any effect in case of self-pollinating or asexually reproducing plant species as they do not depend on other organisms for reproduction.