| A | B |
| selective breeding | desired traits |
| hybridization | dissimilar organisms |
| inbreeding | similar organisms |
| polyploid | many sets of a chromosome |
| genetic engineering | changing the DNA code |
| restriction enzyme | cut DNA at specific sequence |
| gel electrophoresis | separate DNA using electric current |
| recombinant DNA | gene spliced to DNA strand |
| polymerase chain reaction PCR | to make many copies of same gene |
| plasmid | small circular strand of DNA |
| genetic marker | used to isolate bacteria with new gene |
| transgenic | contain genes from other organisms |
| clone | organism produced from single cell |