12. Which of the following statements is false? A. Genetic drift is more likely to occur in a small population. B. The dominant allele is always the most common allele in the gene pool. C. Evolution can be detected by noting a deviation from a Hardy-Weinberg equilibrium of allele frequencies in the gene pool of a population. D. Random mating occurs when individuals pair by chance.

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Genetic Variation

Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.

Quantitative Genetics

Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.