Problem 2.4. The authors of [38] studied the frizzle character of fowls. A frizz

Question

Problem 2.4. The authors of [38] studied the frizzle character of fowls. A frizzled fowl has genotype FF, a normal fowl has genotype ff and a fowl with genotype Ff is slightly frizzled. This is an example of codominant alleles. Use the Punnett square or the tree diagram to illustrate all the possible genotypes and phenotypes of the offspring and the associated probabilities, in the following cases: (a) both parents are slightly frizzled; (b) only one parent is slightly frizzled and the other is normal; (c) only one parent is slightly frizzled and the other is frizzled.

Explanation / Answer

So, for part A:

P(FF) = 1/4

F(Ff) = 1/2

P(ff) = 1/4

For part B:

P(FF) = 0

F(Ff) = 1/2

P(ff) = 1/2

For part C:

P(FF) = 1/2

F(Ff) = 1/2

P(ff) = 0

PART A: F f F FF Ff f Ff ff PART B: F f f Ff ff f Ff ff PART C: F f F FF Ff F FF Ff

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