Think of all the people in the world, and all the different alleles they've inherited.

Makes it possible for homologous recombination to occur easily between different alleles.

This is the reason why different alleles of a gene can have different effects in an organism.

Same locus as Cornish, but proposed as a different allele.

An organism with two different alleles of the same gene.

However, more modern study attributes the variation to 3 different alleles of the Agouti gene.

Two alleles different by descent may or may not be of different state.

An individual can have two copies of the same allele or two different alleles.

The frequency of different alleles varies throughout the population.

A recent research paper using this definition reported cases of transvection between different alleles of Hsp90.