The first of Mendel's genes that was identified at the biochemical level in 1990 125 years after he first published his findings is the round or wrinkled genes. The genes which he discovered that are still uncharacterized are the genes for inflated/constricted pod, axial/terminal flowers, and green/yellow pod where green is dominant to yellow. The gene that is incompletely understood is the gene for purple/white flower.
