Use the Following Information to Answer the Questions Below

question 13

Multiple Choice

Use the following information to answer the questions below.
A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generations, 25% of the animals display a recessive trait (aa) , the same percentage as at the beginning of the breeding program. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the homozygous dominants.
-In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of allele a is 0.1. What is the percentage of the population that is heterozygous for this allele?

• A)90
• B)81
• C)49
• D)18
• E)10

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Definitions:

Type 1 Diabetes

An autoimmune disease where the pancreas produces little or no insulin, leading to high blood sugar levels.

Addison's Disease

A disorder in which the adrenal glands do not produce sufficient steroid hormones, leading to symptoms such as weight loss, muscle weakness, and low blood pressure.

Cushing's Syndrome

A condition caused by excess cortisol in the body, characterized by weight gain, thinning skin, and high blood pressure, among other symptoms.

Thiazolidinediones

A class of medication used to lower blood sugar levels in the treatment of type 2 diabetes by increasing insulin sensitivity.