from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.
- n. The expression of a specific trait, such as stature or blood type, based on genetic and environmental influences.
- n. An individual or group of organisms exhibiting a particular phenotype.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The appearance of an organism based on a multifactorial combination of genetic traits and environmental factors, especially used in pedigrees.
- v. To evaluate or classify based on phenotype
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. what an organism looks like as a consequence of the interaction of its genotype and the environment
We now know that genes modulate biological processes rather than features or traits by themselves, and that the phenotype is the net result of many processes.
On the other hand, the metabolically normal obese phenotype, is exemplified by numerous small and functional adipocytes, and thus a normal metabolic profile, despite a high BMI.
I believe this type of contingency therefore, to be a necessary condition for any change in phenotype requiring more than rudimentary changes genetically, (more than single point mutations certainly), IF, (and that's a big "IF"), those changes occur via the Darwinian mechanism.
This explanation seems unlikely to us because the Cit+ phenotype is characteristic of the entire species, one that is very diverse and therefore very old.
Daniel Smith: I believe this type of contingency therefore, to be a necessary condition for any change in phenotype requiring more than rudimentary changes genetically, (more than single point mutations certainly), IF, (and that's a big "IF"), those changes occur via the Darwinian mechanism.
The expression of genes is called the phenotype, and it is influenced by a host of different factors, many of them environmental.
A phenotype is what a set of genes make: a whole living creature.
Perhaps not NDS specifically, but "modern evolutionary theory," "standard model of evolution" and whatever else you want to call it has always assumed evolution proceeds by incremental small changes in phenotype by virtue of the relative success of certain minor variations.
The cause and effect relationship between genes and phenotype is observable.
We need to distinguish between two things: Gene-centrism, according to which all the information required to construct the phenotype is located in the genome (although the environment may also have a slight influence); and genetic determinism, according to which all human behavior, whether religion, temperament, or tendency to commit rape is determined by the genes.