NEET Biology question

‘A brief reduction in size of a population, due to natural calamities, usually leads to random genetic drift’. For this statement, identify the correct example from the following.

(A)Human population of Pitcaim island
(B)Polydactylic dwarfs in Amish populationCorrect
(C)Long –necked giraffe
(D)Industrial melanism

Answer: (B)

Solution

The variations that occur by chance in a small population are collectively called random genetic drift. It is of two types, i.e., founder effect and bottleneck effect. Bottle necks are natural calamities like

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Question ID VK-121178