A genetic linkage group on the long arm of chromosome 17 is reported. A maximum likelihood of theta; = 0.20 between the centromere-based locus D17Z1 and COLlAl has been found, as well as a theta; = 0.10 between COLlAl and GHl. The most likely order of the three loci is D17Z1-COL1A1-GH1.
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