The work of the scientist credited with the discovery of what he called "chiasmatypie" was continued by what American scientist? 
Thomas Hunt Morgan: Thomas Hunt Morgan (September 25, 1866 – December 4, 1945) was an American evolutionary biologist, geneticist, embryologist, and science author who won the Nobel Prize in Physiology or Medicine in 1933 for discoveries elucidating the role that the chromosome plays in heredity.
i don't know