We have 6 ducks. 4 Pekins and 2 Runners. 1 male (a Pekin) and 5 are female. We recently had some eggs hatch and I'm curious about their coloring. We have 12 ducklings. 6 are all yellow (2 that look to be crested) and 6 that are black and yellow. Our Runners are beige and white. We didn't expect to see black and yellow. Is this from the Pekin/Runner mix? Do Pekins have some recessive gene that would make them this color? Or something else? Just curious... Thanks!