Draw a small concept map showing how selection, genetic drift, gene flow, and mutation relate to genetic variation.

Video transcript

Hello everyone and welcome to today's video. So in today's video we have that which of the following tends to only reduce genetic variation. So let's begin by answer choice. A natural selection. Natural selection involves just the selection of trades or lose. And the selection depending on how it occurs. Can either increase or decrease the frequency of different meals depending on if they're selected or not. So we're going to cancel it all because we're looking for the process that only reduces genetic variation. So we're going to now jump into gene flow, which is answer choice C and gene flow. Is the exchange all the leos between populations and this exchange of a leo's leads to the introduction of new leo's into the population's increasing their genetic variation. So this is also something that is not going to only reduce genetic variation and we're going to cancel it out. Then we have mutations. And the thing about mutations is that they alter the genetic code and they create new Orleans. Does that are then introduced into the population. Since their new leo's being introduced, we're going to increase the genetic variation of this population. And this is not going to be the process that we're looking for. And this all lifts us with genetic drift. And genetic drift is, for example, a certain phenomenon that only reduces the genetic variation of our population. So for example, the bottom net effect is when a certain natural phenomenon such as a tornado kills most of the organism inhabiting a certain area. Because of these only a few organisms and only a few leos are left. So this involves genetic drift, and it involves only the reduction of genetic variation or correct answer. And the end of the video, I really hope this helped you, and I have to see you on the next one.