| A | B |
| heterozygous | two different alleles |
| incomplete dominance | offspring may have an intermediate phenotype |
| multiple alleles | more than 2 possible alleles |
| phenotype | physical appearance |
| polygenic | group of gene pairs working together |
| genotype | genes of an organism |
| pedigree | tool for looking at families |
| punnett square | tool for predicting outcomes |
| purebred | produces offspring with same traits |
| homozygous | alleles are the same |
| recessive | factor that disappears |
| genetics | study of heredity |
| heredity | passing on of traits |
| allele | different forms of a gene |
| dominant | covers up another factor |
| probability | math used to figure chance of an outcome |
| mendel | father of genetics |
| XY | boy |
| XX | girl |
| hemophilia | bleeding disorder that is sex linked |