| A | B |
|---|
| gene | part of a DNA code on a chromosone |
| extinction | evidence of this found in fossils |
| heredity | passing traits from parent to offspring |
| genetics | science of heredity |
| traits | features inherited from parents |
| recessive | traits that are expressed when both alleles are present |
| dominant | alleles that show their effect whenever they are present in the genotype |
| evolution | Darwin & Wallace's theory |
| phenotype | visible traits of an organism |
| gender | male and female |
