As much as selection consists of a evolution mechanism and affects genetic variation, populations also suffer from other mechanisms that may result on different effects than selection. Selection, as well as inbreeding and genetic drift, leads to a lower genetic variation. Other forces of evolution such as outbreeding, migration and the physical distribution of individuals contribute to a higher genetic variation of a population. One or more mechanisms may occur simultaneously, maintaining the genetic variation of a population.
Reference:
https://www.nature.com/scitable/topicpage/the-genetic-variation-in-a-population-is-6526354/
Your explanation is very simple, and I love it! You make sure all of the points are there, easy to understand and not lost in a sea of words. Keep it up!
ReplyDeleteYou did a good job in explaining genetic variation and I like that you mentioned how multiple mechanisms may work at once! I agree that migration is a major contributor since new alleles are introduced by it.
ReplyDeleteI definitely agree that there are often more than one mechanisms that maintain genetic variation. I think the our genome is very large and complicated that there often a lot more factors playing into phenotype than we think.
ReplyDelete