| A | B |
| Karyotype | A picture of all the chromosomes in a cell arranged in pairs |
| Pedigree | A chart that tracks the particular traits within a family. |
| Sex chromosomes | The X and Y chromosomes which determine the sex of the offspring |
| Sex-linked | A gene carried on the X or Y chromosome |
| Inbreeding | Selective breeding method where individuals with identical or similar sets of alleles are crossed |
| Genetic engineering | Transfer of a gene from the DNA of one organism into another to produce a strain of the organism with the desired traits |
| Gene therapy | The insertion of a copy of a gene into the cells of a person with a genetic disorder |
| Human genome project | An international effort to map the complete human genetic code |
| Genetic disorder | A disorder or disease that is inherited genetically |
| Clone | An organism that is genetically identical to the organism from which it was produced |
| Selective breeding | Method of breeding that allows only those organisms with desired characteristics to produce the next generation |
| Multiple alleles | 3 or more alleles or versions of the same gene (more than 2) |