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Q.

Read the following statements.

(a) If allele frequencies in a population change, evolution has occurred.

(b) Hardy-Weinberg equilibrium is not affected by bottle neck effect.

(c) Genetic drift which affects HW equilibrium operates in small populations.

(d) Gene migration causes change in allelic frequency, but not gene flow.

Choose the correct set from the following.

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a

a-T, b-T, c-T, d-T

b

a-F, b-T, c-T, d-F

c

a-T, b-F, c-T, d-F

d

a-T, b-F, c-F d-F

answer is C.

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Detailed Solution

Bottle neck effect is a type of genetic drift which affects HW equilibrium.

Gene flow is also a factor that affects HW equilibrium. When gene migration happens multiple times, it is called gene flow. 

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