Natural selection is when organisms with a desirable trait mate and produce babies with that trait. The process of elimination will eventually diminish any that do not have that trait/
Adaptations
Because the offspring of an organism with a desirable inherited trait is more likely to survive than the offspring of an organism with a desirable acquired trait (because the offspring of an organism with a desirable acquired trait will not have its parent's desirable trait).
Gene dominance is usually determined through breeding experiments. If one allele masks the expression of another allele in the heterozygous state, the masked allele is considered recessive while the masking allele is dominant. By observing the phenotypic ratios of offspring in controlled crosses, dominance relationships can be inferred.
dominant trait NovaNet
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Bearing
Selective breeding.
The principle of natural selection is that the fastest or the strongest (in other words the most skill at a trait) would be the most desirable mate and the weak ones that lacked these skills or mutations like thumbs would not be mated with. So the principle of natural selection is we will always find the strongest, fastest or the most intelligent or other advanced traits more desirable.
Low coupling
An ancestral trait is a trait that is shared by a group of organisms and their common ancestor. It is a characteristic that has been inherited from a common ancestor and has been passed down through generations without change.
Purebred.
By definition all organisms grow and reproduce.