Non-quiz #4—An exploration
Linkage and DNA Structure
1.
What’s the difference between:

Two-point cross vs three-point cross

Cis linkage vs trans linkage

Complimentary and complementary

Ribose vs deoxyribose

DNA structure vs RNA structure

Purines and pyrimidines
2.
What is meant by the phrase, “Linkage map distances are not necessarily additive”?
3.
What is “complete linkage”? If you do a test cross AaBb x aabb, in which the linkage in the
heterozygous parent is *cis*, and the A gene and the B gene are essentially completely linked,
what outcome do you expect to get in the offspring?
4.
What is the “central dogma” of genetics?
5.
Just what is it that a gene actually does?
6.
What does the term “double helix” mean?