You are on a jury to decide the following case: The Jones family claims that bab

Question

You are on a jury to decide the following case: The Jones family claims that baby Jane, given to them at Ucsc Medical Hospital, does not belong to them and that baby Sara, who was presented to the Smith family, really belongs to the Jones family. The Jones allege that the babies were exchanged on 4/20 by the medical staff. The staff deny the allegation Blood group determinations show the following results: Ms. Jones = AB Mr. Jones = O Mrs. Smith = A Mr. Smith = O Baby Jane = A Baby Sara = O A and B are dominant over O and A and B are codominant to one another. Which baby belongs to which family? Sara: Jane: Human cells normally have 23 pairs of chromosomes. For each of the following stages state the number of DNA molecules present in a human cell. Metaphase of meiosis II Metaphase of meiosis I Anaphase of meiosis II Egg cell

Explanation / Answer

6.

Sara.

She belongs to Smith family. Sara has blood type O. Mr Smith has blopd type O and Mrs Smith has blood type A. Mrs Smith is heterozygous for the allele therefore their baby Sara has blood type O. Jones family cannot have baby with blood type O because Mr Jone has blood type O and her wife has blood type AB. Jones family can have offspring with either blood type A or B but not O.

Jane.

This baby belongs to Jones family, because Mr Jone has blood type O and her wife has blood type AB. Their baby can have either blood type A or B but not O and Jane has blood type A.

7. Metaphase of meiosis II = 46.

Metaphase of meiosis I = 92.

Anaphase of meiosis II = 23

Egg cell = 23.

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