
DNA is similar to a set of instructions written using four letters - A, T, C, and G - which tell the body how to function and develop.
These four letters form a unique combination for each organism, making each one unique.

DNA is similar to a set of instructions written using four letters - A, T, C, and G - which tell the body how to function and develop.
These four letters form a unique combination for each organism, making each one unique.