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Question: dihybrid cross question 79 are based on the following questions...

Question details
Dihybrid Cross
Question 7-9 are based on the following questions
Part II: Dihybrid Cross - Question 7

Questions 7-9 are based on the following situation.
Two pure-breeding rabbits are crossed: a rabbit with gray fur and black pads mates with a rabbit with pink fur and pink pads. All of the offspring (F1 generation) have gray fur and pink pads. These offspring were allowed to mate with each other and their progeny (the F2 generation) produced four different phenotypes as shown below.

F1 F2 226 72 82

For this question assume the random (independent) assortment of two unlinked genes.
7. Using F and f to designate fur colour, and P and p to pad colour, assign genotypes to the following phenotypes from the generations indicated.
HINT: The phenotypic ratios given in the above figure will allow you to determine the dominant and recessive phenotypes and alleles.
(a) Genotype of the parent with gray fur and black pads:

(1 mark)
(b) Genotype of the parent with pink fur and pink pads:

(1 mark)
(c) Genotype of the F1 generation:

(1 mark)
(d) Genotype of the rabbits with pink fur and black pads in the F2 generation:

(1 mark)


This question is based on the information provided above in Question 7.
8. What phenotypic ratio do you expect in the F2 generation? (2 marks)
Enter phenotypes in the following order:
1. rabbits with gray fur and pink pads

2. rabbits with pink fur and pink pads
3. rabbits with gray fur and black pads
4. rabbits with pink fur and black pads


This question is based on the information provided above in Questions 7 and 8
9. Looking at the F2 generation, answer the following probability questions:
(a) What is the probability of having a rabbit with pink fur?

(1 mark)
(b) What is the probability of having a rabbit with black pads?

(1 mark)
(c) What is the probability of having a rabbit with gray fur and pink pads?

(1 mark)
(d) What is the probability of having a rabbit with pink fur and pink pads?

(1 mark)




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