Below you can find the Around 1940 scientists found that mutations in these chromosomal units result in defective enzymes Jeopardy Words Answer. The answer to Around 1940 scientists found that mutations in these chromosomal units result in defective enzymes has 5 letters. This clue belongs to the Biology category and is part of Jeopardy Word Level 1873. If you scroll near the bottom you will find other clues and answers part of level 1873