Please Use the Following Information to Answer the Questions Below

question 71

Multiple Choice

Please 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.
-What is the most reasonable conclusion that can be drawn from the fact that the frequency of the recessive trait (aa) has not changed over time?

• A)The population is undergoing genetic drift.
• B)The two phenotypes are about equally adaptive under laboratory conditions.
• C)The genotype AA is lethal.
• D)There has been a high rate of mutation of allele A to allele a.

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Definitions:

Direct Materials

Raw materials that can be directly attributed to the production of goods, easily identifiable and quantifiable.

Variable Costs

Costs that change in proportion to the level of production or sales activities of a business.

Cost Per Unit

Cost per unit is the total expense incurred to create or purchase a unit of product, calculated by dividing total costs by the number of units produced or purchased.

Fixed Factory Overhead

Costs related to the production that do not vary with the level of output, such as rent, salaries of permanent staff, and depreciation.