Let us say you have three alleles in a population of beetles. Two colors; brown is recessive to green. Thus you have; GG, which is homozygous dominant and green, you have Gb, which is heterozygous and also green. Then you have bb, which is homozygous recessive. This is your population of beetles.
What do you think the allele frequency would be if GG, the homozygous dominant, either immigrated, or emigrated out of or into your population of beetles? Since the frequency of Gb and bb would necessarily go down statistically you would see more green morphologies and a change in genetic allele frequency. Assuming normal conditions.
There is no evolution. Random mating, no immigration/emigration, or, in short, Hardy-Weinberg equilibrium holds.
A population in which the allele frequencies do not change from one generation to the next is said to be in equilibrium.
If a population does not have a particular dominant allele, it could return to the population through the immigration of new individuals carrying the dominant allele.
Equal fitness in a population
Equal fitness in a population
There is no evolution. Random mating, no immigration/emigration, or, in short, Hardy-Weinberg equilibrium holds.
It is a situation where allele frequencies remain constant.
A population in which the allele frequencies do not change from one generation to the next is said to be in equilibrium.
The population is evolving.
Evolution; the change in allele frequencies over time in a population of organisms.
If a population does not have a particular dominant allele, it could return to the population through the immigration of new individuals carrying the dominant allele.
Equal fitness in a population
population size decreases
The term used to describe the generation-to-generation change in allele frequencies of a population is simply evolution. Simple answer for a complicated-looking question. ;) Hope this helps.
Equal fitness in a population
Gene or allele frequency
Evolution, of course.Evolution is the change in allele frequency over time in a population of organisms.