also known as SHH, which dissolves the tissue between the fingers and toes, and the webbing disappears. In some fetuses, this process does not occur completely between all fingers or toes and some residual webbing remains.

Genetics

Five types of syndactyly have been identified in humans. The corresponding loci associated with these types and their common phenotypical expression are as follows:
* type I: 2q34-q36; webbing occurs between middle

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