An allele, or allelomorph, is a variant of the sequence of nucleotides at a particular location, or locus, on a DNA molecule. Alleles can differ at a single...

In genetics, dominance is the phenomenon of one variant (allele) of a gene on a chromosome masking or overriding the effect of a different variant of the...

Allele frequency, or gene frequency, is the relative frequency of an allele (variant of a gene) at a particular locus in a population, expressed as a...

alleles are being passed from past generations to future ones. They also provide a diagram displaying each individual that carries a desired allele,...

alleles with paternal alleles. These tables can be used to examine the genotypical outcome probabilities of the offspring of a single trait (allele)...

Lethal alleles (also referred to as lethal or lethals) are alleles that cause the death of the organism that carries them. They are usually a result of...

population genetics, a fixed allele is an allele that is the only variant that exists for that gene in a population. A fixed allele is homozygous for all members...

called alleles. While some genes have only one allele because there is low variation, others have only one allele because deviation from that allele can...

A null allele is a nonfunctional allele (a variant of a gene) caused by a genetic mutation. Such mutations can cause a complete lack of production of the...

Wright effect, is the change in the frequency of an existing gene variant (allele) in a population due to random chance. Genetic drift may cause gene variants...