The Cleft Chin Trait Follows a Dominant-Recessive Inheritance Pattern with Cleft

question 8

Multiple Choice

The cleft chin trait follows a dominant-recessive inheritance pattern with cleft chin being the dormant trait.John is heterozygous for a cleft chin as is his wife Betty.John and Betty have three kids all of which have a cleft chins.According to Punnett square prediction what is the likely hood that their next child will have a cleft chin?

• A) 25% chance the same probability for all subsequent children
• B) 0% because the three pervious children have cleft chins already
• C) 100% chance because the mother and father both have cleft chins
• D) 75% chance the same probability for all subsequent children