A Large Population of Laboratory Animals Has Been Allowed to Breed

question 29

Multiple Choice

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 (A2A2) , the same percent as at the beginning of the breeding program. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the homozygous dominants.
What proportion of the population is most likely heterozygous (A1A2) for this trait?

• A) 0.05
• B) 0.25
• C) 0.50
• D) 0.75

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Definitions:

Cognitive Restructuring

A psychological technique aimed at identifying and challenging negative and irrational thoughts and replacing them with more balanced and constructive ones.

Coping Abilities

The skills and strategies individuals use to manage stress, challenges, or adversity.

Stress

A response by the body and mind to challenges or demands, characterized by physical, emotional, or psychological strain or tension.

Staff Burnout

A state of physical, emotional, and mental exhaustion caused by prolonged stress or frustration, particularly in the workplace.