Which of the Following Is a Component of the Total

question 7

Multiple Choice

Which of the following is a component of the total variability of a trait?

• A) Additive effects of alleles
• B) Dominance interactions among alleles
• C) Environmental effects
• D) Epistatic relationships among alleles
• E) All of these

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Definitions:

Genetic Drift

A mechanism of evolution that results in a change in the frequency of alleles in a population due to random sampling of organisms.

Mutation

A permanent alteration in the DNA sequence that makes up a gene, which can result in a change in the physical traits or health of an organism.

Speciation

The process of forming new species.

Homo Sapiens Idaltu

An extinct subspecies of Homo sapiens that existed about 160,000 years ago, known from fossils found in the Middle Awash area of Ethiopia.