The full set of genetic material in an organism's cells is called its genome.

In eukaryotes, DNA in the nucleus is organized in linear strands called chromosomes.

Sequences of nucleotide base pairs make up genes that code for proteins.

Humans have 23 pairs of chromosomes, one of each pair inherited from our mother, one from our father, for a total of 46.

You may inherit different versions of a gene from your parents.