Talk show segment on paternity analysis

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Question

While watching television with 2 friends, you see a talk show segment on paternity analysis. A woman with type A blood has a baby with type B blood. The woman claims that a man with type O blood is the father of the baby. Your friend Maria says that the baby looks EXACTLY like the man, so he MUST be the father. Your friend Bridget says that she has a feeling that he just isn't the right guy. Based on what you know about genetics of blood typing, determine whether the man can be the father and then explain why to your friends.

The fall of the Russian royal family was due in part to hemophilia, a recessive, X-linked disease that inhibits blood clotting. Czar Nicholas II and Czarina Alexandra had five children. Both the Czar and Czarina had normal blood clotting, as did their four daughters. However, their son, Alexi, had hemophilia. As the sole male heir to the crown, this was quite an issue, and some believe it led to concern regarding Alexi's ability to lead. Explain the inheritance of this disease by providing the following:

Alexi's genotype

Genotype of Czar Nicholas

Genotype of Czarina Alexandra

Genotypes of daughters (there are 2 possibilities - what are they, and how do you know?)

Based on this information, who is responsible for giving Alexi the hemophilia allele?

Reference no: EM133934885

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