3.14

• chromosome - the genetic data inside a cell which is in the nucleus (brain) of the cell
• chromosomes are made up of DNA molecules which come in a helix shape
• a section of DNA is called genes
• depending on what kind of organism you are, the chromosome count in your body will be different
• chromosomes function in (homologous) pairs, which means that if you took a gene on one chromosome (called gene loci), and when you would go to the corresponding gene on the opposite chromosome, it would be the same gene
• therefore we have 2 versions of each gene, called alleles