What is DNA, explain?

the fundamental and distinctive characteristics or qualities of someone or something, especially when regarded as unchangeable

Heres the dictionary definition:

"DeoxyRibonucleic Acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.'

What it mainly means is that DNA is what makes up a person. You get certain strands from parents. DNA is your mom has black hair and your dad does to so your obviously going to have black hair.