| A | B |
| homozygous | has two of the same allele for a gene |
| heterozygous | has two different alleles for a gene |
| homozygous dominant | HH |
| homozygous recessive | hh |
| alleles | the different forms of a gene |
| genotype | the genes for a trait |
| phenotype | what the organism ends up looking or being like |
| P1 | this generation was two purebreds |
| F1 | this generation was all hybrids |
| F2 | this generation was 3/4 dominant trait and 1/4 recessive trait |
| purebred | parents, grandparents, etc were all the same |
| hybrid | results from a cross between two different varieties |
| dominant | the allele that shows up when two different ones are present |
| recessive | the one that is hidden when the other is present |