You\'re a Pokemon breeder. You recently crossed a purple eared, yellow Pikachu t

Question

You're a Pokemon breeder. You recently crossed a purple eared, yellow Pikachu to a black eared, green Pikachu. Both parents have two stripes on their tails. The offspring obtained from the first two litters in this cross had the following characteristics: All of the offspring were yellow. 8 had purple ears and one stripe on their tails. 6 had black ears and one stripe on their tails. 21 had purple ears and two stripes on their tails. 25 had black ears and two stripes on their tails.

a. For each character, report which trait is likely recessive and which is dominant (this may not be possible for all characters).

b. What are the genotypes of the parents that could give you this result?

c. Given your answers to a and b, what are the expected number of offspring per phenotype? Can you reject independent assortment of these genes given the original observed numbers from above? Provide statistical evidence to support your answer.

d. Assuming you produced another litter of 6 animals from these parents, what is the probability of obtaining the following offspring: 3 with two stripes and black ears, 2 with one stripe and purple ears, 1 with 1 stripe and black ears.

Explanation / Answer

a. Double stripe and yellow body color is dominant to single stripe and green body color respectively.

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