| GENETICS PROBLEMS - Human Blood Types |
| BIOL 1406 |
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| In humans, the ABO blood group is inherited by a
single gene (I) with three alleles. The alleles are Ia,
Ib, and i. These alleles produce the blood groups A, B,
AB, and O. |
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| The Rh factor of blood is inherited by a separate gene
with two alleles. The dominant allele (D) produces Rh positive blood
and the recessive allele (d) produces Rh negative blood. |
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| 1. Bob has type A blood and his mother had type O
blood. What is the genotype of Bob and his mother? |
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| 2. If Bob (same as in #1) marries Mary who has type O
blood, what blood types are possible for their children? |
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| 3. If Bob ( from #1) had married Greta who has type AB
blood, what blood types would have been possible in their children? |
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| 4. Paula has type B negative blood. Her mother has
type O positive blood and her father has type AB positive blood.
What is the genotype of each individual? |
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| 5. Dick has type AB negative blood and he marries Jane
who has type B positive blood. Jane's father has type O negative
blood. What blood types are possible in their children and the
percent chance of each occurring? |
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| 6. A woman with type A positive blood is married to a man
with type B positive blood. If they have a child with type O
negative blood, what is the genotype of each individual? |
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| 7. Sarah has type A positive blood and one of her parents
had type O negative. She marries Bill who has type B negative
blood. One of Bill's parents had type O positive blood. What
are the blood types possible in their children and the percent chance of
each occurring? |
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| 8. A woman with type B positive blood gives birth to a
baby with type O negative blood. She claims the father is a man with
type A negative blood. Based on the blood type information, could he
be the father? Why or why not? |
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| 9. A woman with type A negative blood gives birth to a
baby with type AB positive blood. Could the father be a man with
type O negative blood? |
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