The natural selection that acts against change in the form and keeps the population constant through the time is

Primary source of allelic variation is

Darwin's theory of natural selection to explain organic evolution was based on

Factor affecting the Hardy-Weinberg principlesare

$(I)$ Gene flow ;

$(II)$ Genetic drift

$(III)$ Mutation

$(IV)$ Genetic recombination

$(V)$ Natural selection

The correct combination is

A population is in Hardy- weinberg equilibrium for a gene with only two alleles. If the gene frequency of an allele $A$ is $0.7$, the genotype frequency of $Aa$ is

Genetic equilibrium means