| A | B |
|---|
| allele | different versions of the same gene |
| genotype | the genetic makeup of an organism |
| phenotype | the expression of a persons genes |
| heterozygous | two different alleles |
| homozygous | two alleles that are the same |
| gene | section on a chromosome that codes for a specific trait |
| chromosome | rod shaped structures made of DNA and found inside the nucleus |
| mating line | line connecting a mother and father in a pedigree |
| child line | line connecting a child and parent in a pedigree |
| dominant | allele that will always show if it is present |
| recessive | need two of these for the trait to be expressed |
| codominant | in a heterozygous individual, both alleles are expressed |
