For example, it is clear that dramatic changes in phenotype can occur from few mutations of key developmental genes and phenotypic differences among species often map to relatively few genetic factors.
Por exemplo, está claro que poden ocorrer cambios drásticos no fenotipo a partir de poucas mutacións de xenes do desenvolvemento claves e as diferenzas fenotípicas entre especies a miúdo mapan a relativamente poucos factores xenéticos.