[tex]\huge{\underline{\underline{\boxed{\sf{ \orange{ αηѕωєя : }}}}}}[/tex]
- Genetic drift can cause big losses of genetic variation for small populations.
- Population bottlenecks occur when a population’s size is reduced for at least one generation.
- Because genetic drift acts more quickly to reduce genetic variation in small populations, undergoing a bottleneck can reduce a population’s genetic variation by a lot, even if the bottleneck doesn’t last for very many generations.
- This is illustrated by the bags of marbles shown below, where, in generation 2, an unusually small draw creates a bottleneck.
Hope Helps~