Conquer the Kaplan Nursing Entrance 2025 – Prep, Practice, and Prosper!

Question: 1 / 2700

B is the dominant allele for which eye color?

Blue

Green

Brown

The dominant allele for eye color, indicated here as B, is associated with the brown eye color. In genetics, traits like eye color are determined by multiple genes, but specific alleles can dominate the expression of others. In this context, the presence of the dominant allele leads to the production of brown pigment in the iris, which is why individuals with at least one dominant allele (B) will typically have brown eyes.

The other colors listed, such as blue, green, and gray, generally result from recessive alleles; therefore, they appear when the individual has two copies of recessive genes. This understanding of dominance and recessiveness in genetics clarifies why brown is linked to the dominant allele in this scenario.

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Gray

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