Question

complete a punnett square for parents that have the genotypes bb and bb. (use scratch paper if needed). use the key below to determine what color eyes will their children likely have? bb = brown eyes bb = brown eyes bb = blue eyes 50% brown; 50% blue 75% brown; 25% blue 0% brown; 100% blue 100% brown; 0% blue

Explanation:

Step1: Set up Punnett - square

The parents have genotypes BB and Bb. The possible gametes from the BB parent are all B, and from the Bb parent are B and b.

Step2: Fill in Punnett - square

	B	B
b	Bb	Bb

Step3: Analyze genotypes and phenotypes

The genotypes of the offspring are BB:Bb = 2:2 or 1:1. Since B (brown eyes) is dominant over b (blue eyes), all offspring will have brown eyes.

Answer:

100% Brown; 0% Blue