FRQ 01 / 087 points total
HeredityChange
Labrador Coat Color and Epistasis
| Genotype | Coat Color |
|---|---|
| B_ E_ | Black |
| bb E_ | Brown (chocolate) |
| B_ ee | Yellow |
| bb ee | Yellow |
(a)Identify the type of gene interaction shown in Table 1 and describe which gene is epistatic to the other. [2 pts]
(b)Two dogs with genotype BbEe are crossed. Predict the expected phenotypic ratio of the offspring, and justify using a 9:3:3:1 framework. [3 pts]
(c)A breeder crosses a yellow lab (genotype unknown) to a chocolate lab (bbEE). The litter contains both black and yellow puppies. Determine the genotype of the yellow parent and explain your reasoning. [2 pts]