| A | B |
|---|
| homozygous | alleles are identical |
| heterozygous | includes recessive and dominant allele |
| genotype | represents the alleles of an organism |
| phenotype | observed trait |
| dominant | trait that masks another trait |
| recessive | trait that is only observed in homozygous form |
| gene | a segment of DNA that codes for a protein |
| allele | alternate forms of a gene |
| Mendel | father of genetics |
| monohybrid cross | cross that involve one trait |
| dihybrid cross | cross that involves two traits |
| chromosomes | coiled DNA that contains genetic material |
| codominant | equal expression of both alleles |
| hemophilia | sex-linked genetic disease |
| punnett square | used to predict outcomes of a cross |
