Question

Jessica's mother has the blood type AB and her father has the blood type O. Which blood type could Jessica have? Draw a Punnett square on scratch paper to help you answer the question, if needed.

Answer 1

Step 1: Figure out genotypes of parents

Jessica's mom: I^A I^B
Jessica's dad: ii


Step 2: Punnett Square:
           ( i )      ( i )
(I^A)   I^Ai     I^Ai  
(I^B)   I^Bi     I^Bi



Step 3: List possible phenotypes

Jessica could be either blood type A (I^Ai) or blood type B (I^Bi)