they make you who you are (5)

I believe the answer is:

genes

(Other definitions for genes that I've seen before include "Units of DNA" , "Units of heredity" , "Biological factors controlling heredity" , "Factors governing heredity, carried by chromosome" .)

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.