Download Blood Type #1

Blood Types Worksheet #1
Name ______________________________
Human blood types are determined by genes that follow the CODOMINANCE pattern of inheritance. There are two
dominant alleles (IA and IB) and one recessive allele (i). COMPLETE THE TABLE BY FILLING IN THE GENOTYPES.
Blood Type
(Phenotype)
Genotype
Can donate blood to:
Can receive blood from:
O
________
A,B,AB and O
(universal donor)
O
AB
_______
O, AB
A,B,AB and O
(universal receiver)
A
________ or _______
AB, A
O,A
B
________ or ________
AB,B
O,B
1. Write the genotype for each person based on the description:
a.
b.
c.
d.
e.
f.
g.
Homozygous for the “B” allele
Heterozygous for the “A” allele
Type O
Type “B” and had a type “O” parent
Type “AB”
Blood that can be donated to anybody
Can only get blood from a type “O” donor
___________
___________
___________
___________
___________
___________
___________
2. Pretend that Brad Pitt is homozygous for the type B allele, and Angelina Jolie is type “O.” What are all the
possible blood types of their baby?
3. Draw a Punnett square showing all the possible blood types for the offspring produced by a type “O” mother and
an a Type “AB” father
4. Mrs. Clink is type “A” and Mr. Clink is type “O.” They have three children named Matthew, Mark, and Luke. Mark
is type “O,” Matthew is type “A,” and Luke is type “AB.” Based on this information:
a. Mr. Clink must have the genotype ______
b. Mrs. Clink must have the genotype ______ because ___________ has blood type ______
c. Luke cannot be the child of these parents because neither parent has the allele _____.
5. Two parents think their baby was switched at the hospital. Its 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.”
a. Mother’s genotype: _______
b. Father’s genotype: _______
c. Baby’s genotype: ______ or ________
d. Punnett square showing all possible genotypes for children produced by this couple
e. Was the baby switched?
6. 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. A man has type A blood and his wife has type B blood. A physician types the blood of their four children and finds,
to their surprise, one of each of the four blood groups. Give the genotypes of the man and his wife, and show
(using the PUNNETT SQUARE) the genotypes of their four children.
8. A wealthy, elderly couple die in an automobile accident. Soon afterward, a man shows up to claim their fortune.
He claims that he is their only son who ran away from home as a young boy. Other relatives dispute this claim.
Hospital records show that the deceased couple had blood types AB and O.
a. Give the genotypes of the elderly couple, and use a Punnett square to show the possible genotypes of
their offspring.
b. Was the man the elderly couple’s son? ________________
9. A man knows that he is blood type B, and that his mother was reported to be blood type O. The man marries a
woman with blood type AB.
a. ________What is the man’s genotype?
b. ________ What is the woman’s genotype?
c. Give the chances that this couple will have a child with blood type:
“A”? __________ “B”?____________ “AB”?___________”O”?____________
10. A man with type AB blood is married to a woman with type O blood. They have two natural children and one
adopted child. Jane has type A blood, Bobby has type B blood, and Grace has type O blood. Which child was
adopted? Use a Punnett Square as evidence.