DNA		an exchange of allele between populations
genotype		part of a nucleotide where you find adenine, thymine, guanine, or cytosine
genome		a unit of heredity information made of DNA
genetic code		a triplet, three nucleotides
base pairing		different forms of the same gene
double helix		structure found in nucleus of a cell which contains genes
heredity		an allele that is expressed regardless of the other allele
codon		the full collection of genes needed to make a specific organism
chromosome		the shape of DNA
base		the exact order of the nucleotides in a gene
dominant allele		substance of heredity
gene flow		chemical rule that govern how DNA is assembled
gene		the process by which traits are passed down from parent to their offspring
heterozygous		having two different alleles for a given gene
allele		the actual allele or gene carried by an individual