 
 <prompt> How alleles dey show face? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Genes fit get mutations for their sequence, wey fit make dem get different variants wey dem dey call alleles for population. Dis alleles dey encode small-small different versions of protein, wey fit cause different traits. When person talk say e get gene (e.g., "good genes," "hair colour gene"), e dey mean say e get different allele of the gene. Genes dey change sake of natural selection or survival of the fittest of the alleles. 