Which chromosome is polydactyly found in?

Many : OMIM lists 372 genetic loci causing polydactyly. Many are parts of other multiple malformation syndromes and quite a few just affect the fingers or toe, he latter being mapped to chromosomes 4, 7, and 13. Nigerians have a high rate of postaxial polydactyly, usually peduncilated postminimi--over 20%, and blacks have about 10 times the rate of Caucasians. The Japanese have a form of preaxial polydactyly, usually a double terminal phalanx of the thumb, which they regarde as good luck.