Question
Biology Question on human health and disease
In the population of a species, chances of the spreading of a mutant gene increases when it is:
(A) Recessive
(B) Natural selection
(C) Dominant
(D) Neither dominant nor recessive
(B) Natural selection
Solution
Explanation:
Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes. Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination). Genetic variations that alter gene activity or protein function can introduce different traits in an organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection). Hence, the correct option is (B).