Question

1. analyze: dominant alleles are always expressed when present. recessive alleles are not expressed when the dominant allele is also present. look at the two alleles for fur color.

a. which allele is dominant, and which fur color does it produce?

b. which allele is recessive, and which fur color does it produce?

Explanation:

To answer these questions, we need to assume typical scenarios (since the specific alleles aren't provided, but in common genetics problems like fur color in organisms like mice or rabbits):

Part A

In most standard fur - color genetics problems (e.g., in mice, where black fur is dominant over brown fur; in rabbits, where agouti or black can be dominant over white etc.), the dominant allele is the one that is expressed in the heterozygous condition. For example, if we take a common case where the allele for black fur (let's say represented as \(B\)) is dominant over the allele for brown fur (\(b\)). The dominant allele (e.g., \(B\)) produces the dominant fur color (e.g., black). A general answer based on common genetic examples: The dominant allele (e.g., allele for black fur in many cases) is dominant and it produces the dominant fur color (e.g., black). If we consider a specific example like in Mendel's experiments or common lab organisms, the dominant allele for fur color (say \(B\) for black) is dominant and produces black fur.

Part B

The recessive allele is the one that is only expressed in the homozygous recessive condition. Using the same example as above, the recessive allele (e.g., \(b\) for brown) is recessive and produces the recessive fur color (e.g., brown). In the presence of the dominant allele (\(B\)), the recessive allele (\(b\)) will not be expressed. So, the recessive allele (e.g., allele for brown fur) is recessive and produces the recessive fur color (e.g., brown).

Answer:

s:
A. (Assuming a common example) The allele for black fur (e.g., \(B\)) is dominant and it produces black fur.
B. (Assuming a common example) The allele for brown fur (e.g., \(b\)) is recessive and it produces brown fur.

(Note: If there was specific information about the alleles (like letters or descriptions) in the original problem that was not provided here, the answer would be adjusted accordingly. For example, if the alleles were given as \(F\) and \(f\) with some context, we would use that context to determine dominance and recessiveness.)