kids encyclopedia robot

Allele frequency facts for kids

Kids Encyclopedia Facts

Allele frequency refers to the different forms of a gene at a single position on a chromosome. It is the proportion of a given allele to all alleles at the same locus. It is usually expressed as a percentage.

Allele frequencies may be used to describe genetic diversity in a population. If the frequency of any allele is above 1% it is probable that natural selection is maintaining it at this level. This is because the natural mutation rate of an allele is almost always much lower than 1%.

A fixed allele is one allele that exists for a particular population. A fixed allele is homozygous for all members of the population.

The term allele refers to one variant gene out of several possible for a particular locus in the DNA. When all but one allele go away, one only remains. That allele is said to be fixed.

kids search engine
Allele frequency Facts for Kids. Kiddle Encyclopedia.