From what I understand, purple passions, highways and the like, are allelic. I think that's the word, but it means that the purple passion can only add either Mojave or mystic and not both. So while you can get either in the clutch, you can't get a purple passion from her unless the male has a copy of either gene as well. BHB did a snake bytes episode on it, and he explains it a lot better.
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