Founder and Bottleneck Effect (Evolution)

[PRESENTATION ONLY, NO NARRATION]

TEXT: "Founder Effect: A reduction of genetic variation that happens when a small group of individuals starts a new population."

VISAL: A group of mice are seen on the left side of a stream. Half of the mice then split off from the group and move to the other side of the stream to "start a new population."

TEXT: "Bottleneck Effect: When a large portion of a population is killed or prevented from reproducing. Increases the chance of genetic drift."

VISUAL: A group of mice are pictured. An animation of a lightning bolt appears and "sets" half the group on fire and they disappear.