n.either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same character

"some alleles are dominant over others"

同義詞：allelomorph

1. Different alleles can result in variations of a specific trait in an organism.
   不同的等位基因可以導(dǎo)致生物體特定性狀的變異。
2. In a population, the frequency of alleles can change over time due to natural selection.
   在一個(gè)種群中，由于自然選擇，等位基因的頻率可能會(huì)隨著時(shí)間的推移而變化。