| A | B |
| dominant | a "stronger" trait is expressed if the allele is present |
| recessive | a "weaker" trait that is not expressed unless the dominant is present |
| phenotype | the physical appearance of a trait |
| genotype | the genetic makeup of an organism's traits |
| homozygous | 2 alleles for a trait are the same |
| heterozygous | 2 alleles for a trait are different |
| mitosis | body cells reproducing to form identical daughter cells with the same # chromosomes |
| meiosis | sex cells producing slightly different daughter cells with half the chromosomes |
| sperm | the male gamete |
| egg | the female gamete |
| gamete | cells that combine in sexual reproduction |
| incomplete dominance | when 2 dominant traits are crossed and the result is a mixture of the phenotypes |