| A | B |
|---|
| aneuploidy | the condition of having an abnormal number of chromosomes |
| fetus | developing mammal from nine weeks until birth |
| karyotype | charted arrangement of chromosomes possessed by an individual; helpful in locating aneuploidies such as Down syndrome |
| sickle-cell anemia | blood disorder of abnormally shaped blood cells |
| Tay-Sachs disease | autosomal recessive disorder of the central nervous system; results in death by age five |
| phenylketonuria | disease where one amino acid cannot be broken down |
| cystic fibrosis | disease where breathing is difficult because mucus collects in the lungs |
| Huntington's disease | genetic disorder caused by a rare autosomal dominant allele |
