Figure 22.2 The Distribution of Pocket- Mouse Coat Colours in Several Arizona

question 1

Multiple Choice

Figure 22.2
The distribution of pocket- mouse coat colours in several Arizona populations is associated with substrate colour Some populations live on light- coloured granite substrate, and others live on dark volcanic rock. In Figure 22.2, chart A shows the frequency of the melanic dark) coat phenotype across six populations. Populations C, D, and E live on dark volcanic rock; populations A, B, and F live on light- coloured granite. Chart B shows the
Frequency of the Melanocortin- 1 receptor Mc1r) allele across these populations. The Mc1r alleles, D and d, differ by four amino acids; mice with DD and Dd genotypes have dark coats, whereas mice with dd genotype are light coloured. Which of the following statements best interprets the results shown in charts A and B?

• A) Frequency of the D allele is closely associated with both the melanic phenotype and the presence of dark substrate colour.
• B) Frequency of the D allele is closely associated with the melanic phenotype, but is unrelated to the presence of dark substrate colour.
• C) Frequency of the D allele is not associated with the melanic phenotype, but is associated with the presence of dark substrate colour.
• D) Frequency of the D allele is associated neither with the melanic phenotype nor with the presence of dark substrate colour.
• E) Frequency of the D allele does not vary.

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Definitions:

Resistance

Opposition to an idea, individual, or group, often manifesting in social, political, or personal contexts.

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Refers to things that might happen or could be achieved in the future, emphasizing potential or opportunity.

Social Structure

The patterned social arrangements in society that are both emergent from and determinant of the actions of individuals and groups.