I am so confused. I don't understand exactly. If both parents are homozygous or "visual" examples of simple recessive mutations, then all the offspring should be "Double Het" for both traits. If these two different simple recessive traits rest on the same allele, then all the babies should be visuals like the Paradigm Boas.

You have 15 non-visuals and four visuals. I assume the mother is the "Blonde T" animal correct? Then sperm retention would explain the four visuals as four "Blonde T" animals. Unless I am missing something, which is certainly possible, I don't think there is another explanation other than that I detailed. Is there?
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