| A | B |
|---|
| a diagram made of symbols that identify three things: -1. Male or female -2. Individuals affected by the trait being studied -3. Family relationships | PEDIGREE |
| circle on a pedigree represents | female |
| square on a pedigree represents | male |
| square or circle with line through them | deceased |
| siblings that form a triangle | twins |
| a chart that shows family inheritance patterns | pedigree |
| unshaded circle | unaffected female |
| gene in question is located on one of the numbered, or non-sex, chromosomes. | autosomal |
| 23rd chromosome | sex chromosome |
| Lack of pigment in skin, hair, & eyes | albinism |
| excess mucus in lungs, digestive tract, and liver | cystic fibrosis |
| accumulation of phenylalanine in tissues; mental disorders; lacks enzyme to break down phenylalanine | Phenylketonuria |
| lipid accumulation in brain cells; results in mental disorders and blindness | Tay-Sachs |
| Autosomal dominant disorder | Huntington's disease |
| sex chromsome number | 23rd |
| excess cholesterol in blood; heart disease | Hypercholesterolemia |
| excessive bleedings due to missing protein important for blood clotting-X linked sex linked | Hemophilia |
