Genotype: 6. A couple with a newborm baby is troubled that the child does not re

Question

Genotype: 6. A couple with a newborm baby is troubled that the child does not resemble either of them. Suspecting that a mix-up occurred at the hospital, they check the blood type of the infant and find that it is type O. As the father is type A and the mother type B, they conclude that a mix-up must have occurred.[Hint: Blood group is example of co-dominance] (3 pts.) Child can have blood type(s):??,A , B , c Child can never have blood type(s): A Is the couple correct? Show your work below and explain your reasoning. [Hint: There is only one possible Punnette square) P1- P2 7. In humans, the allele for free earlobes is dominant to the allele for attached earlobes and is not sex-linked. A woman with attached earlobes has children with a man who is heterozygous for free earlobes. Deduce the following: A) Genotype of mother Attaned earlobes RGD

Explanation / Answer

According to the given data the children has blood group O, the genotype of the children then should be IoIo

father is type A, the genotype should be either IAIA or IAIo

mother is type Be, genotype shoud be either IBIB or IBIo

If the parents are IAIo andIBIo

IAIo X IBIo

the children can have the following types. A (IAIo), B( IBIo), AB (IA IB) or O (IoIo)

Thus the parents are not correct, they can have children with blood group Ö

IA

Io

IB

IA IB

IBIo

Io

IAIo

IoIo

IA

Io

IB

IA IB

IBIo

Io

IAIo

IoIo

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