| A conceptual framework for understanding how polygenes give rise to discrete phenotypic variation is the threshold model. |
| A second testicular metric that may correlate with reproductive potency and phenotypic condition is directional asymmetry. |
| Certainly around the turn of the 20th century, Darwinian views were opposed by some botanists because of phenotypic plasticity. |
| Classical quantitative genetics has applied linear modeling to the problem of mapping genotypic to phenotypic variation. |
| The temperature at which the eggs of ectothermic vertebrates incubate can influence several phenotypic traits of offspring. |
| The two populations allow for a comparative phenotypic analysis of species-specific genome introgressions in a common genetic background. |
