What is the probability that each of the following pairs of parents will produce the indicated offspring?

Question

What is the probability that each of the following pairs of parents will produce the indicated offspring? (assume independent assortment of all gene pairs.) Provide only the fraction for your answer.

a) CCDDEE × ccddee = CcDdEe Answer:

b) CCDdEe × CcDdEe = CCddEE Answer:

c) CcDdEe × CcDdEe = CcDdEe Answer:

d) ccDdEE × CCDdee = CcDdEe Answer:

Answer 1

You are working with a trihybrid cross. The results can be calculated by following the principles of segregation and independent assortment.

Perform a test cross with one of the pairs of traits, say CC x Cc. The result is CC, Cc, CC, Cc. Or, in other words, 1/2 CC and 1/2 Cc. Perform this operation for the rest of the pairs. Once you find the probability of each trait, multiply the probabilities to find your desired genotype.

A) 1

B) 1/32

C) 1/8

D) 1/2