Codominance Worksheet (Blood Types) Page 2
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26.
Two other parents think their baby was switched at the hospital. The mother has blood type “A,”
the father has blood type “B,” and the baby has blood type “AB.”
a.
Mother’s genotype: _______ or ________
b.
Father’s genotype: _______ or ________
c.
Baby’s genotype: ______
d.
Punnett square that shows the baby’s genotype as a possibility:
e.
Was the baby switched?
7.
Based on the information in this table, which man could not be the father of the baby? Justify
your answer with a Punnett square.
Name
Blood Type
Mother
Type A
Baby
Type B
Guy at the gym
Type O
The mailman
Type AB
The waiter
Type A
The cable guy
Type B
8.
Based on the information in this table, which man could not be the father of the baby? Justify
your answer with a Punnett square.
Name
Blood Type
Mother
Type A
Baby
Type O
Landscaper
Type O
Guy at the club
Type AB
Cabdriver
Type A
Flight attendant
Type B
9. Explain why blood type data cannot prove who the father of a baby is and can only prove who the
father is not.
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