Multiple Alleles/Blood Types

Multiple Alleles/Blood Types

Genetics

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Multiple Choice

What type of inheritance controls blood types in humans?

• incomplete dominance

• polygenic inheritance

• multiple alleles

• recessive genes

Multiple Choice

A man with type O blood has children with a woman who is heterozygous for type A blood. What is the probability that their children will have type A blood?

• 0%

• 25%

• 50%

• 75%

Multiple Select

Suppose that a mother has blood Type A and genotype I^Ai and the father has blood Type B and genotype I^Bi. Draw a Punnett square to find the possible genotypes of their children.

What are the possible phenotypes of the kids? (select all that apply)

• Type A

• Type B

• Type AB

• Type O

Open Ended

(Add Punnett Square to scrap paper) In a paternity case, a single mother claimed that a certain man was the father of her baby. The man denied it, claiming that her current boyfriend was the father. The court ordered a blood test (much cheaper than DNA testing) to see if he could be ruled out as the father. The mother was Type O and the baby was Type O. The man was Type AB. Is it possible that he was the father? Why or why not?

Open Ended

We just confirmed that a blood test can "rule out" a potential father in paternity testing. However, do you think it can "confirm" paternity? Why or why not?