| A | B |
| heredity | passing of traits from parents to offspring |
| alleles | different forms of a trait that a gene carries |
| genetics | study of how traits are inherited |
| hybrids | receiving different alleles for a trait from each parent |
| dominant allele | a factor that wins over a recessive allele |
| recessive allele | a factor that falls to a dominant allele |
| Punnett Square | tool used to predict results in genetics |
| genotype | genetic make-up of an organism |
| phenotype | how an organism looks and behaves because of its genotype |
| homozygous | an organism that has 2 alleles for a trait that are the same |
| heterozygous | an organism with 2 alleles for a trait that are different |
| incomplete dominance | when the offspring of 2 homozygous parents show an intermediate phenotype |
| polygenic inheritance | when a group of gene pairs act together to porduce a trait |
| sex-linked genes | an allele inherited on a sex chromosome |
| genetic engineering | expermints that try to change the arrangement of DNA that makes up a gene |