Question
Biology Question on evolution
In which condition, the gene ratio remains constant for any species :-
A
Sexual selection
B
Random mating
C
Mutation
D
Gene flow
Answer
Random mating
Explanation
Solution
Allele frequency in a population can remain constant only if individuals of the population randomly interbreed. Generally it never happens in nature and species populations exist in small groups of randomly breeding subpopulations. Thus allele frequency between two subpopulations may differ but allele frequency within the subpopulation will remain constant. Such subpopulations are termed Mendelian populations or deme. Exchange of genes between demes takes place occasionally. Mutation, gene flow (due to migration), etc. may tend to change the allele frequency of the subpopulation.