EvolutionEasy

Question

Which is the most common mechanism of genetic variation in the population of sexually reproducing organism?

Options

A.Chromosomal aberrations
B.Genetic drift
C.Recombination
D.Transduction

Solution

(c) [Key Concept: Genetic Variation — Recombination Most Common] RECOMBINATION is the most common mechanism of genetic variation in sexually reproducing organisms. Recombination occurs during every meiosis (through crossing over and independent assortment of chromosomes), producing new combinations of alleles in offspring. It operates in every sexually reproducing individual in every generation. Chromosomal aberrations and mutations are less frequent events; genetic drift is a random evolutionary process; transduction is a bacterial gene transfer mechanism.

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