Question

what was thomas hunt morgans main contribution to science? he discovered that certain traits were linked to the x chromosome. he was the first to use fruit flies in research. he created the first white - eyed female drosophila. he created the first white - eyed male drosophila.

Explanation:

Thomas Hunt Morgan conducted experiments on fruit - flies (Drosophila melanogaster). His most significant contribution was discovering that certain traits were linked to the X - chromosome, which provided evidence for the chromosomal theory of inheritance. While he used fruit - flies in research, he wasn't the first to do so. Creating specific white - eyed Drosophila was not his main scientific contribution.

Answer:

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