Galton coined the term regression to describe an observable fact in the inheritance of multi-factorial quantitative genetic traits : namely that the offspring of parents who lie at the tails of the distribution will tend to lie closer to the centre, the mean, of the distribution.
42.
"' Quantitative genetics "'is a branch of population genetics that deals with phenotypes that vary continuously ( in characters such as height or mass ) as opposed to discretely identifiable phenotypes and gene-products ( such as eye-colour, or the presence of a particular biochemical ).
43.
In quantitative genetics, where phenotypes are measured and treated numerically, if a heterozygote's phenotype is exactly between ( numerically ) that of the two homozygotes, the phenotype is said to exhibit " no dominance " at all, i . e . dominance exists only when the heterozygote's phenotype measure lies closer to one homozygote than the other.
44.
According to his profile on the University of North Carolina Minority Health Project website, he believes : there are still significant academic and popular views of race that are mired in the biological determinism of the 19th century and the application of proper scientific method and philosophy, along with quantitative genetics reveals the underlying racist ideology of these programs.
45.
Barton moved to the University of Edinburgh in 1990, where he is said to have been instrumental in attracting to the university Brian and Deborah Charlesworth, with whom he had previously collaborated, thus complementing the university's strong tradition in quantitative genetics with a population genetics side and making the University of Edinburgh one of the foremost research institutions of genetics in the world.
46.
Rigorously testing these criteria necessitates a synthetic approach, combining areas of research like community ecology, functional morphology, adaptation, quantitative genetics and phylogenetic systematics ( Dayan and Simberloff 2005 ), While satisfying all six criteria in a single study of character displacement is not often feasible, they provide the necessary context for research of character displacement ( Losos 2000, Dayan and Simberloff 2005 ).
