Evolution Question 98

98. Genetic drift is change of

[1993]

(a) gene frequency in same generation

(b) appearance of recessive genes

(c) gene frequency from one generation to next

(d) none of the above

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Answer : c

Hints & Solution

(c) Genetic drift is also known as Sewall Wright effect. It refers to the random changes in gene frequencies in a population by chance, either due to intensive inbreeding or death of a small section of population by natural calamity. Its effect is more marked in small isolated population.