Select the correct statements regarding Hardy-Weinberg principle.
(A) Sum total of all the allelic frequencies is 1.
(B) Genetic drift affect Hardy-Weinberg principle.
(C) Allele frequencies in a population are stable and is constant from generation to generation.
(D) The gene pool continues changing generation after generation.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A), (B) and (C) only
The Hardy-Weinberg principle says that allele frequencies in a population are stable and stay constant from generation to generation. The gene pool, which is the total of the genes and their alleles in the population, stays constant. This state is called genetic equilibrium. Gene migration, genetic drift, mutation, genetic recombination and natural selection disturb it.
(A) Sum total of all the allelic frequencies is 1. — Correct. The frequencies of all the alleles of a gene add up to 1.
(B) Genetic drift affect Hardy-Weinberg principle. — Correct. Genetic drift is a chance change in allele frequency. It is one of the factors that disturb the equilibrium.
(C) Allele frequencies in a population are stable and is constant from generation to generation. — Correct. This is the principle itself.
(D) The gene pool continues changing generation after generation. — Incorrect. The principle says that the gene pool remains constant. It changes only when a disturbing factor acts.
NCERT Extract:
Hardy-Weinberg Principle –
