Answer:
W.S. Sutton.
Explanation:
Chromosomes may be defined as the structure that shows thread like appearance present inside the nucleus. Chromosome consists of DNA an the protein associated with it.
Sutton and Boveri explained the chromosomal theory. According to this theory, genes are located on the chromosomes in a fixed position and they are located at the specific position on chromosome. These genes are inheritable to the next generation.
Thus, the answer is W.S. Sutton.