- Mar 20, 2013
- 551
- 186
- 241
Yoda, if the father was visually IB, he could be split purple and opal as one theory goes. The mother could be purple split opal. Both parents could be offspring from purple male on opal hen. The new Taupe males could then have easily received a purple and an opal from both parents, thus making it a colour combination. To produce a taupe hen (using better odds), you could breed a male split opal and purple to an opal hen.
If Taupe is Purple-Opal as you're supposing, another test would be to breed a Purple male to a Taupe female. If you get any Purple sons, you know that Taupe is Purple combined with something -- because in order for a son to show Purple, he must get one copy of that gene from Mom. Since hens can't be split to Purple, that nixes the idea that maybe she carried it but didn't show it.
If Taupe is a completely distinct separate single mutation (i.e. not the result of something combined with Purple), then all the Purple offspring from my proposed test-mating would be hens, and all the sons would be IB split to Taupe and Purple.

Last edited: