A) the genes were selectively advantageous
B) the genes were dominant
C) the genes were sex-linked
D) the population increased
Correct Answer: A
Solution :
Each gene probably has its own characteristic mutational behaviour. Some genes undergo mutations more frequently than others in the same organisation and are called unstable or mutable. This gene is likely to mutate if its mutant form will allow the population to adapt successfully in the environment. Thus, frequency of a mutant gene in a population would be likely to increase if the genes were selectively advantageous.
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