Exam 2

Question 1

What are the three linkage arrangements with 3 genes?

Answer 1

The three genes could be unlinked, 2 genes could be linked and the third unlinked, or all 3 could be linked

Question 2

How can you tell what linkage arrangement 3 genes are in?

Answer 2

If 3 genes are unlinked it will assort independently
2 genes linked, one unlinked 2 sets of 4 equally frequent classes
All linked, parental most frequent, doubles least frequent, 4 recombinants all same frequency

Question 3

If two genes are linked and one is unlinked, how do you determine the unlinked gene?

Answer 3

Compare 2 in the parental category with 2 of the same and one different. The one that is different is the unlinked