| A | B |
|---|
| traits | physical characteristics |
| heredity | the passing of traits from parent to offspring |
| genetics | the study of the passing of traits from parent to offspring |
| dominant allele | a genetic factor that blocks another genetic factor |
| recessive allele | the genetic factor that gets blocked by a dominant genetic factor |
| phenotype | how physical traits appear or are expressed |
| genotype | the alleles of an organism's genes |
| homozygous | two identical alleles for a trait |
| heterozygous | two different alleles for a trait |
