The figure below is a Punnett square. Using the information provided in the passage and the figure, answer the questions that follow.?
a. What is the purpose of this figure?
b. The passage states that both parents are heterozygous for coat color. What does this statement mean?
c. How can you use the information in the figure to determine the coat color of the parents?
d. What are the genotypes of predicted homozygous offspring?
e. What is the probable genotypic ratio of the cross represented in the graphic?
What is the probable phenotypic ratio of the cross represented in the graphic?
Answers
hcbiochem
a. To show how coat color in rabbits can be transmitted to offspring b. An individual who is heterozygous carries one copy of (in this case) the dominant allele and one copy of the recessive allele for the trait. c. Because the offspring appeared in a 3:1 ratio of dominant : recessive, both parents HAD to be heterozygous for this trait. Because they are heterozygous and have one dominant allele, they will show that cominant coat color. d. 1/4 of the offspring will be homozygous for the dominant trait and have genotype BB. 1/4 of the offspring will be homozygous for the recessive trait and have genotype bb. e. 1:2:1 genotypic ratio 3:1 phenotypic ratio
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