7.4 Population Genetics - AP Biology

In this video, I go over the basics of gene pools and allele frequencies, while discussing the five main ways that microevolution occurs a.k.a. the five main ways that allele frequencies change from one generation to the next.

[@cheukyansang9223]

6:02 hi mr.poser, why do harmful alleles become fixed a bad thing?

[@magmagalaxy5014]

That's a good question. tbh i think he did a typo cause it does not make sense

[@vamperia5673]

i think what he meant is that if for example the only survivors of the chance event are elderly, they wouldnt be able to reproduce and end the bloodline that kind of thing

[@Adam-fv1ec]

i think it’s more of an example; traits that make organisms less fit (i.e. green beetles in a brown environment) may become more prevalent within a population resulting from a bottleneck that, by chance, leaves the population with more green than brown resulting from the genetic drift.