What is the substance that genes are composed of,that determines the nature of each cell in the body and how it will function?

A) chromosomes
B) gametes
C) zygotes
D) deoxyribonucleic acid (DNA)

Deoxyribonucleic Acid

The molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses.

Chromosomes

Rod-shaped portions of DNA that are organized in 23 pairs.

Gametes

Reproductive cells (sperm and oocytes) that contain half the genetic material of an organism, which unite during fertilization to form a new organism.