Where does “polygene” come from?

polygene (English) comes from English gene, from German gēn, from Middle High German gēn, from Old High German gēn, from Proto-West Germanic gān, from Proto-Germanic gāną, from Proto-Indo-European ǵʰengʰ- — to walk; to step.

polygene (English): A group of nonallelic genes that act together to...