Activity 4: Baby Switching?
Objective: Investigate and solve a problem using Punnett square.
Directions: Read the problem below and answer the following questions.
Write your answer on a separate sheet.
Two parents think their baby was switched at the hospital. It’s 1968,
so DNA fingerprinting technology does not exist yet. The mother has blood
type “O”, the father has blood type “AB”, and the baby has blood type B”.
Guide Questions:
1. Give the genotype of the:
a. Mother: ___________ b. Father: ___________ c. Baby: ___________
2. Complete the Punnett square to predict the possible genotypes of their
children. What are the possible genotypes of the children of this
couple?
3. Was the baby switched? _______________.
4. Write a persuasive written explanation for the parents about your
answer for question number 3.
Rubrics W