ase Ms. Adents king for support payanemts M at Child Yara lake blood sampl Blood

Question

ase Ms. Adents king for support payanemts M at Child Yara lake blood sampl Blood Type Q3a. Considering ONLY the l gene nat specifies the antiges sor ABO isporme the emect of other genes), can Mr. Xavier be the child's father! Can Mr be the child's father? (8 point) Q3b. If you know that either Mr. Xavier or Mr. Zulu is the father (no other men umder consideration), what are your best guesses for 1 antigen genotypes for the following people (again, just consider the I gene and no other genes) points) Ms. Adams? Mr. Xavier? Mr. Zulu? Child Yara? Q3e. If Ms. Adams and Mr. Zulu have a child together in the future, what is the probabiliry than the child will be blood type AB? Give your reasoning. (4 points)

Explanation / Answer

Q3 a)No,Mr Xavier cannot be the father of the child but Mr Zulu can.

Q3 b) Mr Zulu is the father of child Yara because:

If we consider the genotype of Ms Adams as IAIO and that of Mr Zulu as IBIO , on crossing we get the following results:

There are 25% chances that we get a child of genotype IOIO i.e. O blood group of the child.Therefore,according to these results we can say that Mr Zulu is the father of the child.

Hence,best guesses for I antigen genotypes for the following people are as follows:

Q3 c)Ms Adams has a blood group A, it means that her genotype can be IAIA or IAIO

Mr Zulu has a blood group B, it means that his genotype can be IBIB or IBIO

According to the 4 genotypes,there can be the following chances of having a child of blood group AB:

The child will be having 100% AB blood group

2.If there is a cross between  IAIA and IBIO

There is 50% probability that the child will be having blood group AB

3.If there is a cross between  IAIO and IBIB

There is 50% probability that the child will be having blood group AB

4.If there is a cross between  IAIO and IBIO

There is 25% probability that the child will be having blood group AB.

IA IO IB IAIB IBIO IO IAIO IOIO

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