Q. 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
A) I, II and III
B) III, IV and V
C) I, III and V
D) I, II, IV and V
Explanation
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
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.