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:

Dialectical Behavior Therapy

A type of cognitive-behavioral therapy designed to teach individuals skills to cope with stress, regulate emotions, and improve relationships, originally developed for treating borderline personality disorder.

Cognitive Therapy

A form of psychotherapy that focuses on changing negative thought patterns to improve mood and behavior.

Unconditional Positive Regard

An attitude of total acceptance and support, regardless of what a person says or does, primarily important in client-centered therapy.

Carl Rogers

An influential American psychologist and among the founders of the humanistic approach to psychology, known for his client-centered therapy.