| A | B |
|---|
| Artificial Selection | humans allow only selected organisms to produce offspring |
| Natural Selection | the stuggle for exsitence selects the fittest individuals to survive in nature |
| Common descent | all living things share common ancestors |
| alleles | different forms of a gene |
| polgenic | descriptions of traits that are controlled by two or more genes |
| adaption | genetically controlled trait that increases an individual's ability to pass along copies of its genes |
| mutation | along with gene shuffling a source of variation in nature that can have poweful positive or negative effects on organisms |
| species | group of similar- looking organisms that can breed with one another and produce fertile offspring |
| fitness | organism's success in passing genes to the next generation |
| gene pool | name for the group of alleles shared by individuals within a species |
