Question

in a group of fruit flies, some individuals have a gray body and others have a black body. in this group, the gene for the body color trait has two alleles. the allele for a gray body (b) is dominant over the allele for a black body (b). the punnett square below shows a cross between two fruit flies. consider the phenotypes of the offspring shown. select one box that represents offspring with a gray body. b b b bb bb b bb bb

Explanation:

Step1: Understand Dominant Allele

The dominant allele (B) for gray body means any genotype with at least one B (BB, Bb) shows gray phenotype.

Step2: Analyze Punnett Square Boxes

• BB: Has two B alleles, so gray.
• Bb: Has one B allele (dominant), so gray.

All boxes (BB, Bb) represent gray - bodied offspring. For example, the top - left box (BB) or top - right (Bb), bottom - left (BB), bottom - right (Bb) can be chosen. Let's pick the top - left box with genotype BB.

Answer:

The box with genotype \( BB \) (or \( Bb \), e.g., the top - left box labeled \( BB \)) represents offspring with a gray body.