Use This Information to Answer the Following Questions

question 9

Multiple Choice

Use this information to answer the following questions.
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.
-What proportion of the population is probably heterozygous (Aa) for this trait?

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

---

Definitions:

HHS

The Department of Health and Human Services, a federal agency overseeing health and welfare programs in the United States.

Past Goals

Objectives or ambitions that someone aimed to achieve in the past but may no longer be pursuing.

Life Expectancy

The average number of years an individual is expected to live, based on current mortality rates and other demographic factors.

Health Expectancy

A population measure that combines age-specific morbidity/mortality to estimate the average number of years a person can expect to live in a specific health state.