| A | B |
|---|
| adaptive radiation | several species are produced from one ancestral species |
| gene | part of the DNA code on a chromosome |
| allele | different forms of a gene |
| extinction | occurs when the last individual of a species dies |
| genetics | the science of how traits are passed from parents to offspring |
| natural selection | organisms well-adapted to their environment survive and reproduce at a greater rate than other organisms do |
| genotype | an organism's genetic makeup |
| phenotype | an organisms observable traits that result from both its genetic makeup and its environment |
| mutation | the process in which DNA changes to form new alleles |
| trait | a feature that an organism inherits |
| evolution | the change in the genetic makeup of a species over time |
