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by WVB
Tue Aug 22, 2006 10:22 pm
Forum: Genetics
Topic: What is the roan cattle and the Jappanese four o'clock ???
Replies: 3
Views: 9208

Probably too late but ... Actually, the four o'clocks display what is called Incomplete Dominance (where only one of the two alleles contributes to the phenotype), and the heterozygote is intermediate in phenotype due to a dosage effect -- it only makes half as much pigment as its homozygous pigment...