part 4

Question 1

linkage

Answer 1

1. opposite to law of independent assortment

the presence of two genes on one particular chromosome

Question 2

who gave the experimental proof of chromosomal theory of inheritance

Answer 2

Thomas Hunt Morgan. He worked with the tiny fruit flies Drosophila melanogaster.

Question 3

give three reasons why he chose the fruit flies

Answer 3

1. they could be grown on simple synthetic medium in the lab
2. they complete their life cycle in about two weeks
3. one mating could produce a lot of progeny