Question

(You may use the back of the page to write your answer if needed) the laws of inheritance. Here is a fun situation for you to solve: Today you have learned about genetics and Baby mix up at a hospital? had a baby last night in the local hospital. At around the same time, Mr. and Mrs. White also had a baby in the same hospital in the room adjacent to the Blacks. Both babies were girls, both weighed about the same, and looked very similar The following day, a nurse brought the babies from the nursery to the new parents, but Mr. and Mrs. Black insist that t wrong baby! To test that, everybody's blood was drawn to establish the blood types. Here are the results Mr. Black has blood type O Mrs. Black has blood type AB The baby in Black's room has blood type O Mr. White has blood type A Mrs. White has blood type B The baby in White's room has blood type A Try to solve this situation using what you have learned about the alleles and genotypes coding for these blood types to est ablish if the Blacks and Whites'babies were switched. Use the Punnett squares to prove your point Have fun with it!

here is the sample of the Punnett squares.

Answer 1

Mr. black has blood group O.

Mrs. black has blood group AB.

Their male gametes are O and female gametes are A and B.

The possible results are AO or BO.

This means the child can be of either blood group A or blood group B

Mr. White has blood group A

Mrs. White has blood group B

They can be either homozygous or heterozygous. Let us consider both options.

If they are homozygous, male gametes can be A and female gametes can be B. The resultant child will be of blood group AB.

If they are heterozygous, male gametes can be A or O and female gametes can be B or O. The child can be of A, B, O or AB blood groups.

The blacks cannot have a child with blood group O. As the baby in their room is of blood group O, the baby is not theirs definitely.

The whites can have baby with any or the four blood groups. The baby in their room has blood group A.

As there are only two babies here, they are definitely interchanged and both of them got wrong babies.

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5. As you have already shown in the punnet squares, the chances of having baby with blood type B is 2 among 4 which is half. That is 50% chance.

6. As you have clearly shown in the punnet square, the chances of having baby with blood type B is 1 in 4. That is one fourth or 25% chance.

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