15) Both the founder event and genetic bottlenecking A. Increase the genetic variability of a new...

15) Both the founder event and genetic bottlenecking A. Increase the genetic variability of a new population after the event.

B. Always lead to extinctions.

C. Decrease the genetic variability of a new population after the event.

D. Are always caused by natural disasters.

Expert Solution

Correct Answer is Option C.

Founder event is caused when a small population gets separate from the original population to form a new one. This causes reduction in genetic diversity.

Bottleneck effect refer to heavy decrease in the size of the population due to famine, earthquake, other natural calamities, disease or other human activities.

Thus the resultant effect of both these phenomenon will only lead to decrease in the genetic diversity nad variability of new population after the event.

1. Option A is wrong because in neither case genetic variability has any chance of increase.

2. Option B is wrong because bottle neck effect cause reduction in population size. Thus the only naturally fit individuals are selected to survive. Thus they provide a healthy start to new generation hence chance of extinction is less.

3. Option D is wrong because only bottle neck effect is caused by natural disaster. But founder events are caused only due to population division which is not due to natural disaster.

gladiator answered 2 years ago

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