Question

The number of trout in a lake drops when the lake is polluted. The trout population later increases, but the allele frequency is different than it was before the pollution. What type of situation is this?

A. Founder
B. Mass extinction
C. Genetic drift
D. Bottleneck

Answer 1

@thomaster

Answer 2

D? IDK

Answer 3

hm let me check that in my book, brb

Answer 4

ok

Answer 5

Hm I'm sure it's not mass extinction or genetic drift

Answer 6

Founder effect is when a small group leaves a population and establishes a new population. This will make the genetic variation decrease.

Bottleneck is when a population reduces in size due to some environmental event. It will cause only few individuals from the population to remain and these will repopulate the group. So the genetic variation decreases.

which of these 2 scenario's looks the most like your question case?

Answer 7

d

Answer 8

@thomaster

Answer 9

Yes :)