So, I just got a totally random little crested duckling out of Ancona/runner mix parents, and I was really exited to breed him when old enough because he is a pretty perfect duckling in terms of temperment, growth, ect. (I’m considering breeding my own type of duck as as a little genetics project hopefully for school credit). ... However, I just found out crested ducklings carry a lethal gene, and I really want to be ethical when it comes to breeding animals. It’s such a bummer as this little guy is super sweet and just overall perfect... what is the likelihood of genetic defects if I cross him with a totally different un crested breed (say, a Welsh Harlequin?) I personally own his aunt, uncle, mom, and dad, and I’ve seen a picture of his grandfather and none of them have crests. Does this totally negate the possibility of using him for breeding?