Question

evolution: genetic drift
drag and drop the correct word/phrase from below to complete each sentence.
genetic drift is a change in allele ______________.
it occurs due to ______________.
when only a small proportion of the original population survives, causing a sudden change in allele frequency, we call this the ______________.
if a small proportion of the population establishes a new population with a different allele frequency, we call this the ______________.
genetic drift is more likely to happen in ______________.
bottleneck effect disaster founder effect chance frequencies larger populations smaller populations

Explanation:

Genetic drift is a change in allele frequencies due to chance. The bottleneck effect occurs when a small proportion of the original population survives and causes a sudden change in allele frequency. The founder effect is when a small - proportion of the population establishes a new population with a different allele frequency. Genetic drift is more likely in smaller populations.

Answer:

Genetic drift is a change in allele frequencies.
It occurs due to chance.
When only a small proportion of the original population survives, causing a sudden change in allele frequency, we call this the bottleneck effect.
If a small proportion of the population establishes a new population with a different allele frequency, we call this the founder effect.
Genetic drift is more likely to happen in smaller populations.