Cystic Fibrosis Punnett Square

• What does "Ff" mean in cystic fibrosis?

  Is a carrier
• What does "ff" mean?

  Has cystic fibrosis
• What does "FF" mean?

  Is healthy
• If both parents are Ff, what is the chance of a child being ff?

  25%
• If both parents are Ff, what is the chance of a child being Ff?

  50%
• Which child will have cystic fibrosis?

  ff
• What does a Punnett square show?

  Inheritance of genes
• What are the four possible outcomes of Ff × Ff?

  FF, Ff, Ff, ff
• What is the chance of passing on the faulty gene if one parent is a carrier?

  50%