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From what I've learned on the Ameraucana thread, there are three "beard choices" -- 1) having a big beard at hatch and maintaining it through maturation and adulthood; 2) going through a "beardless" or "almost beardless" stage and get their (smaller) beards late; and 3) not having a beard at all. That's how the "incomplete dominance" of the bearded gene comes into play. In "true dominance" there would be no difference in appearance between a bird with one "beard gene" and a bird with two "beard genes." In "incomplete dominance" there is a difference in appearance between a bird with one copy and a bird with two copies, giving the effect of a "double dose" of the gene. What is found with the beard gene is that birds with two "beard genes" look like #1, birds with one "beard gene" look like #2, and birds with no "beard genes" look like #3.
Think of it the way Black/Blue/Splash works. Black is equivalent to "no beard", Blue is equivalent to "one beard gene", and Splash is equivalent to "two beard genes." Being beardless means having no "beard genes", like being Black means having no "blue genes." Knowing that, look at your bearded birds, and follow the pattern for B/B/S breeding. If your Brabanter cock fits the #1 description, he has two "beard genes" and model him as Splash. If he went through a beardless stage, he has one "beard gene" and model him as Blue. If your pullet is beardless, she has no "beard genes" and model her as Black. Then follow the B/B/S pattern of breeding to determine what you'd get.
Hope that helped.
From what I've learned on the Ameraucana thread, there are three "beard choices" -- 1) having a big beard at hatch and maintaining it through maturation and adulthood; 2) going through a "beardless" or "almost beardless" stage and get their (smaller) beards late; and 3) not having a beard at all. That's how the "incomplete dominance" of the bearded gene comes into play. In "true dominance" there would be no difference in appearance between a bird with one "beard gene" and a bird with two "beard genes." In "incomplete dominance" there is a difference in appearance between a bird with one copy and a bird with two copies, giving the effect of a "double dose" of the gene. What is found with the beard gene is that birds with two "beard genes" look like #1, birds with one "beard gene" look like #2, and birds with no "beard genes" look like #3.
Think of it the way Black/Blue/Splash works. Black is equivalent to "no beard", Blue is equivalent to "one beard gene", and Splash is equivalent to "two beard genes." Being beardless means having no "beard genes", like being Black means having no "blue genes." Knowing that, look at your bearded birds, and follow the pattern for B/B/S breeding. If your Brabanter cock fits the #1 description, he has two "beard genes" and model him as Splash. If he went through a beardless stage, he has one "beard gene" and model him as Blue. If your pullet is beardless, she has no "beard genes" and model her as Black. Then follow the B/B/S pattern of breeding to determine what you'd get.
Hope that helped.

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