Question

If complete linkage occurs, we expect ________.

A) to see all four types of offspring
B) a 1:1:1:1 ratio in the test cross
C) to see only parental phenotypes in the F2 of the appropriate test cross
D) to see only recombinant phenotypes in the F2 of the appropriate test cross
E) a 9:3:3:1 ratio in the F2

Answer 1

If complete linkage occurs, we would expect to see only parental phenotypes in the F2 of the appropriate test cross.

Step-by-step explanation:

If complete linkage occurs, we would expect to see only parental phenotypes in the F2 of the appropriate test cross.

When genes are linked, they are located close together on the same chromosome, and crossing over does not occur frequently.

As a result, the alleles for these genes are inherited together and do not undergo recombination.

Therefore, in the F2 generation of a test cross involving complete linkage, we would observe only the same allelic combinations as the parental generation.