| A | B |
|---|
| 23rd pair | chromosomes which determine one's sex |
| XX | 23rd pair of chromosomes for a female |
| XY | 23rd pair of chromosomes for a male |
| zygote | one-celled organism created from one sperm and one ovum |
| environment | everything that can interact with one's genetic inheritance |
| heredity | specific genetic material inherited from one's biological parents |
| gene | discrete segment of a chromosome that is a basic unit of heredity |
| chromosome | molecule of DNA that contains the genes organized in exact sequences |
| polygenic | traits that are affected by many genes |
| multifactorial | traits influences by both heredity and environmental factors |
