allele

/uh-leel/US // əˈlil //UK // (əˈliːl) //

等位基因,等位数,等价物,等位词

Definitions

n.名词 noun

1
Genetics.
- : any of several forms of a gene, usually arising through mutation, that are responsible for hereditary variation.

The Neanderthals and Denisovans have the same allele for that gene as we do.
If you have a variable, incestual population, not all the descendants have the same alleles, or versions of a gene.
Our current understanding of natural selection is that it operates as a ratio, with the numerator reflecting the success of genes in projecting copies of themselves into the future and the denominator, the success of alternative alleles.