Fixed allele
Encyclopedia
A fixed allele is an allele
that is the only variant that exists for that gene in all the population
. A fixed allele is homozygous for all members of the population.
The term allele normally refers to one variant gene out of several possible for a particular locus
in the DNA. When all but one allele go extinct and only one remains, that allele is said to be fixed.
Allele
An allele is one of two or more forms of a gene or a genetic locus . "Allel" is an abbreviation of allelomorph. Sometimes, different alleles can result in different observable phenotypic traits, such as different pigmentation...
that is the only variant that exists for that gene in all the population
Population
A population is all the organisms that both belong to the same group or species and live in the same geographical area. The area that is used to define a sexual population is such that inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals...
. A fixed allele is homozygous for all members of the population.
The term allele normally refers to one variant gene out of several possible for a particular locus
Locus (genetics)
In the fields of genetics and genetic computation, a locus is the specific location of a gene or DNA sequence on a chromosome. A variant of the DNA sequence at a given locus is called an allele. The ordered list of loci known for a particular genome is called a genetic map...
in the DNA. When all but one allele go extinct and only one remains, that allele is said to be fixed.