Biology
General
Easy
Question
Which of the following statements correctly defines the phenomenon of genetic drift?
I. Random change in gene allele frequency
II. Occur by chance
III. It is directional
IV. Causes elimination of certain alleles
V. Causes fixation of alleles
The correct combination is
- I, II and III
- III, IV and V
- I, III and V
- I, II, IV and V
The correct answer is: I, II, IV and V
I, II, IV and V Genetic Drift is the random change in the allele frequency caused by sampling error across generation in a finite population. The consequences of genetic drift are not predicted that’s why it is called non-directional.
Allele/gene frequency of ‘A’ = 0.2
For allelic frequency A + a = 1
So, allelic frequency of ‘a’ = 1 – 0.2 = 0.8
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