The phenotype, a product of genotype, is the observable traits or characteristics of an organism, for example hair color, weight, or the presence or absence of a disease, except the genes themselves. Differences in phenotype are caused by differences in genotype, but not all phenotypes necessarily have the same genotype. Organisms that contain a dominant allele and a recessive allele for a trait will have the same phenotype as an organism that has two of the same alleles for the dominant trait.
- Edward John Larson (2006). "Doslov (Epilogue)", Evolúcia: neobyčajná história jednej vedeckej teórie (in Slovak). Slovart. “..Jeho teória vychádza zo známeho modelu epigenetickej krajiny Conrada H.Waddngtona. (Actual quote is from Epilogue by Vladimír Kováč, professor of Biology who translated the book by E.J.Larson)”