Which of the Following Is Strong Evidence for a Genetic

question 16

Multiple Choice

Which of the following is strong evidence for a genetic contribution to a behavior?

• A) Dizygotic twins have a higher concordance rate than do monozygotic twins.
• B) Monozygotic twins have a higher concordance rate than do dizygotic twins.
• C) Dizygotic twins have a lower concordance rate than do monozygotic twins.
• D) Adopted children resemble their adopted families with regard to a trait.
• E) Family members are less similar for a trait than are members of the general population.

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Definitions:

Genetic Drift

A mechanism of evolution that causes random fluctuations in the frequency of alleles in a population, especially in small populations.

Mutation

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

Reproductive Isolating Mechanisms

Reproductive isolating mechanisms are biological features of organisms that prevent species from interbreeding, thereby maintaining species separateness.

Interbreeding

The mating or crossing of two individuals from different populations, species, or varieties, leading to the production of offspring.