Use the Following Information to Answer the Questions Below

question 4

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.
-What is the estimated frequency of allele A in the gene pool?

• A)0.05
• B)0.25
• C)0.50
• D)0.75
• E)1.00

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Definitions:

Mechanism

A detailed description of the step-by-step process by which chemical reactions occur, including the breaking and forming of bonds.

Aromatic Ring

A stable ring-shaped molecule made up of alternating single and double bonds, common in many organic compounds.

O,p-director

Substituents that direct incoming substituents to the ortho and para positions in an aromatic ring during electrophilic substitution reactions.

Major Organic Product

The predominant compound produced through an organic reaction, usually of greatest interest or utility.