| A | B |
|---|
| trait | Specific characteristic of a living organism |
| pedigree | A diagram that shows the history of a trait from one generation to the next. |
| dominant trait | Dominates or covers up another trait. |
| recessive trait | A trait that disappears in the presence of dominant trait |
| gene | A specific location on a chromosome that controls a certain trait. |
| pure dominant | Two identical dominant genes, both uppercase |
| pure recessive | Two identical recessive genes, both lowercase |
| heterozygote | An organism with one dominant trait and one recessive trait, dominant trait always shows. |
| punnet square | Shows possible combinations of gene pairs for a given trait. |
| sickle cell anemia | A disease where red blood cells are misshapen like a sickle. |
| incomplete dominance | When neither gene determines dominant and the inherited trait attaches to a normal gene. |
| sex linked trait | A trait that is inherited and attaches to sex chromosomes. |
| heredity | Traits that are passed from one generation to another |
| DNA | Chromosomes in the nucleus of each of your cells that are made of long threads of material. |
| chromosomes | Genetic codes embedded in the chemical structure of DNA |
| cytosine | A base in DNA that pairs with Guanine |
| guanine | A base in DNA that pairs with cytosine |
| thymine | A base in DNA that pairs with adenine |
| adenine | A base in DNA that pairs with Thymine |
| down syndrome | A condition where three chromosomes are present where only a pair should be. |
