Fact 1: Chromosomes are coiled structures made of DNA and proteins.

Fact 2: Sex Chromosomes determine sex of individual.

Given the two facts above, answer the question "What do coiled structures made of DNA and proteins determine?" with the following options: 
- life
 - SNPs
 - sex
 - size
 - cell
 - RNA
 - tRNA
 - gene


 

   sex      