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The phenotypic effect of some particular gene might be, say, green eye colour.
However, there are few phenotypic differences and therefore not many species have been named.
This type of phenotypic variability is found throughout the species range.
This last stage is characterized by major phenotypic changes in the cell.
Instead, over time, the species wobbles about its phenotypic mean.
Humans and other animals have many phenotypic variations in eye color.
However, discrimination may be difficult due to the phenotypic similarity.
Here we have a detailed account of the way genes cause phenotypic effects.
Much research has been done on understanding the triggers involved in phenotypic expression.
In practice most genes have more than one phenotypic effect, say green eye colour and curly hair.
Without phenotypic variation, there would be no evolution by natural selection.
Phenotypic plasticity can also be observed as changes in behaviour.
We should think of the replicator as having extended phenotypic effects.
In the first place, much phenotypic variability does not stem from genetics.
It is the study of gene expression, the way genes bring about their phenotypic effects.
In this way, individuals could potentially undergo large, rapid phenotypic changes.
This is followed by systematic phenotypic analysis of the progeny.
Moreover, a single phenotypic trait is usually determined by many genes.
This has been masked by the Flynn effect for phenotypic intelligence.
In general, these signals provide information about a person's phenotypic quality or cooperative tendencies.
Thus, hunting is an honest and costly signal of phenotypic quality.
Sexual selection makes the phenotypic variation in a species increase drastically.
This is in stark contrast to the phenotypic differences that each displays.
The effect of ancient population bottlenecks on human phenotypic variation.
Phenotypic screening historically has been the basis for the discovery of new drugs.