Which characteristic is biological and determined by genes?

A) sex
B) gender
C) sexual preference
D) gender identity

Biological

Pertaining to the science of life and living organisms, focusing on their structure, function, growth, evolution, and distribution.

Sexual Preference

Refers to an individual's pattern of physical, romantic, and/or emotional attraction to others, based on gender.

Gender Identity

Someone's self-perceived gender identity, which can differ from the sex they were designated when they were born.