Understanding Linkage

The mechanism that causes a gene to move from one linkage group to another is called?

1. inversion

2. duplication

3. translocation

4. crossing-over

Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by:

1.	Henking	2.	Thomas Hunt Morgan
3.	Sutton and Boveri	4.	Alfred Sturtevant