What would be the ratio of brown-eyed | Homework Help

1. Let’s assume for this problem that the world is divided into blue-eyed people and brown-eyed people. Let’s also assume for the sake of simplicity that there is only one gene responsible for eye color and that the allele for brown eyes (B) is dominant over the allele for blue eyes (b). Let’s also assume that blue-eyed people and brown-eyed people randomly intermarry.

a. What would be the ratio of brown-eyed to blue-eyed people in the world?

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b. Calculate the probability of two BB people having a blue-eyed child.

c. Calculate the probability of a Bb person and a blue-eyed person having a blue-eyed child. Construct a Punnet square for this.

d. Calculate the probability of two Bb people having a blue-eyed child. Construct a Punnett square for this.

e. Two brown-eyed people have a blue-eyed child. What can we infer about the eye color of the child’s grandparents?

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