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It's absolutely required for father to have the genes for both lutino and pearl to get any lutino pearl chicks at all. He can be visual for both, visual for one and split to the other, or split to both. "Split" means that a bird has one copy of a mutation gene, but two copies are required for the bird to be visual for that mutation. In other words, a bird with a split is carrying the gene for the mutation, but is not visual for the mutation.

When dad gives the genes for both lutino and pearl to one of his daughters, she will be visual lutino pearl. When he gives both of these genes to one of his sons, the results will depend on what color mom is. If she is visual lutino pearl, the son will be visual lutino pearl. If she is not visual for either of these mutations, the son will be split to lutino pearl but will not be visual for either one. If she is visual for one mutation but not the other, the son will be visual for that mutation and split to the other one.

To really understand how this works, you need to understand the inheritance rules for sex-linked mutations. I have an article on it here: http://www.littlefeatheredbuddies.com/info/breed-sexlinked.html

It may also be helpful to understand how crossovers work. You'll have a better chance of getting a visual lutino pearl baby if dad is visual for both mutations, but a male like this might not be easy to find. If dad is only split to both of these mutations, then crossovers will have an effect on the results. I have an article on it here: http://www.littlefeatheredbuddies.com/info/breed-crossovers.html
 
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