| A | B |
|---|
| karyotype | photograph of your chromosomes |
| autosome | 22 pairs of the human chromosomes |
| sex chromosome | X and Y chromosomes |
| pedigree | A diagram that follows the inheritance of a single trait through a family |
| multiple allele | A type of gene determined by more than two alleles |
| sex-linked gene | the genes located on the sex chromosomes |
| nondisjunction | "not coming apart" |
| trisomy | cells that contain three copies of chromosome |
| chromosome deletions | pieces of chromosomes breaking off and getting lost in meiosis |
| chromosome translocation | pieces of broken chromosomes are reattached to others |
| amniocentesis | withdrawing a small amount of fluid from around the sac of the fetus |
| chronic villus sampling | tissue surrounding the fetus is removed |
