Which of following factor is/ are NOT responsible to change the frequency of alleles in a population?
A. Gene flow or gene migration
B. Natural selection
C. Chemical radiation
D. Genetic drift
E. Genetic recombination
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → C only
A. Gene flow or gene migration — Changes allele frequency.
B. Natural selection — Changes allele frequency.
C. Chemical radiation — Not a factor. It is not among the five factors named.
D. Genetic drift — Changes allele frequency.
E. Genetic recombination — Changes allele frequency.
NCERT Extract:
Hardy-Weinberg Principle – “… Five factors are known to affect Hardy-Weinberg equilibrium. These are gene migration or gene flow, genetic drift, mutation, genetic recombination and natural selection. When migration of a section of population to another place and population occurs, gene frequencies change in the original as well as in the new population.”