Two parents with cleft chins, both heterozygous for cleft chin (Cc), have three children with cleft chins. The parents are sure that their fourth child will not have a cleft chin. Draw a Punnett Square to see if this is possible.
Determine the probability that the fourth child will have a cleft chin.
Using Models: What information does a Punnett square give? Does the Punnett square support the parents' prediction? Explain your answer.
Predicting: If these parents have a fifth child, what are the chances that the child will have a cleft chin? Explain your answer.