Polydactyly is an inherited condition in humans characterized by extra fingers or toes. It is caused by a dominant allele, PPP.
A woman with polydactyly has a father who has a normal number of digits. The woman's partner also has a normal number of digits.
The couple has five children.
Calculate the probability that all five of their children will have a normal number of digits. Give your answer as a fraction, decimal, or percentage.
66 exam-style questions on Edexcel IGCSE Biology Inheritance. Each one has a worked solution and a mark scheme showing where the marks go.