Question

What was Thomas Hunt Morgan's main contribution to science?
1) He discovered that certain traits were linked to the X chromosome.
2) He was the first to use fruit flies in research.
3) He created the first white-eyed female Drosophila.
4) He created the first white-eyed male Drosophila.

Answer 1

Answer:

1- He discovered that certain traits were linked to the X chromosome.