Question

Part 2 - Monohybrid CrossYou discover that one of the Klingons you are studying is going to be a mother and she wants to know ifthe child will have her brown eyes or the father's yellow eyes. In Klingons, eye color is a monogenictrait, meaning that the trait is determined by only one gene. The Father is homozygous recessive for eyecolor (bb) while the mother is heterozygous (Bb). Assume that brown eye color is dominant. Completethe Punnett Square below and determine the genotypic and phenotypic ratios.BbbA. What is the Genotypic ratio?B. What is the Phenotypic ratio.In other words, what are the odds that the mother's child willhave brown eyes?

Answer 1

Bb - mother is heterozygous for brown eyes

bb - father is homozygous recessive for yellow eyes

If Bb x bb are crossed, the following offspings are:

A. Genotypes are Bb - 50% and bb - 50%

Genotypic ratio is 1:1 since both offspings are 50 %

B. Phenotypes are Bb - heterozygous for brown eyes - 50% and bb - homozygous for yellow eyes - 50% or B-25% for brown eyes and 75% for yellow eyes

Phenotypic ration is 1:1 since both offspings are 50% or 1:3 B-brown eyes -25%, b-yellow eyes-75%

The possibility that the mother will have a child with brown eyes is 25% from the Bb which is heterozygous for brown eyes.