Why do people call DNA the genetic code and how does it work?

The genetic code is (nearly) universal

Even in organisms that don't use the "standard" code, the differences are relatively small, such as a change in the amino acid encoded by a particular codon. A genetic code shared by diverse organisms provides important evidence for the common origin of life on Earth.

Explanation:

i can't see the full page, therefore, can't answer it

explanation:

other information encoded in your genes might distinguish you from the others in the group