Answer:
The principle states that "allelic frequencies in a population are stable and remain constant from generation to generation, l e., gene pool is constant."
This is called genetic equilibrium or Hardy Weinberg equilibrium.
It can be expressed as \[{{p}^{2}}+2pq+{{q}^{2}}=1\]
where [p and q are frequencies of different alleles.]
Disturbance in genetic equilibrium results in evolution.
Factors affecting Hardy-Weinberg Equilibrium.
(a) Gene migration or Gene flow
(b) Genetic drift
(c) Mutation
(d) Genetic recombination
(e) Natural selection
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