This scientist worked with Charles Manning Child to show that a small piece of a planarian [pluh-NAR-ee-un] could regenerate an entire organism. Following the work of William Bateson, this scientist found that coupling and repulsion are incomplete, and before the work of Barbara McClintock, he explained Janssens' discovery of crossover. The unit measuring genetic linkage is named for him, and he demonstrated that a white 
This scientist worked with Charles Manning Child to show that a small piece of a planarian [pluh-NAR-ee-un] could regenerate an entire organism. Following the work of William Bateson, this scientist found that coupling and repulsion are incomplete, and before the work of Barbara McClintock, he explained Janssens' discovery of crossover. The unit measuring genetic linkage is named for him, and he demonstrated that a white eyed mutation is sex-linked. Name this scientist famous for his work on Drosophila [dro-soe-FEE-lah] melanogaster, or fruit flies.
This scientist worked with Charles Manning Child to show that a small piece of a planarian [pluh-NAR-ee-un] could regenerate an entire organism.
Thomas Hunt Morgan