If one of the parents was homozygous polydactyly, what would the ratio of affected to non-affected children be

Two parents have polydactyly, they are both heterrozygous. 

What ratio of affected to non affected children would they produce?

Polydactyly is an inherited contioned, due to a dominant allele, causing extra fingers or toes. What is the chance of a child having polydactyly if their parents are Pp and pp?