Question

an allele for brown eyes is expressed over an allele for blue eyes. which letter would be used to represent brown eyes in a genotype? b e e b

Explanation:

In genetics, dominant alleles are typically represented by uppercase letters. Since the allele for brown eyes is dominant (expressed over the blue - eye allele), it should be represented by an uppercase letter. Among the options, "B" is an uppercase letter and is a common convention (using the first letter of the trait, here "brown").

Answer:

D. B