Susan, a mother with type B blood, has a child withtype O blood. She claims that

Question

Susan, a mother with type B blood, has a child withtype O blood. She claims that Craig, who had type A blood, isthe father. He claims that he cannot possibly be thefather. Further blood tests ordered by the judge reveal thatCraig is AA. The judge rules that: (a.) Susan is rightand Craig must pay child support. (b.) Craig is right anddoesn't have to pay child support. (c.) Suasan cannot be thereal mother of the child; there must have been an error at thehospital. (d.) It is impossible to reach a decision based onthe limited data available. (e.) None of the above

Explanation / Answer

Susan, a mother with type B blood, has a child withtype O blood. She claims that Craig, who had type A blood, is thefather. He claims that he cannot possibly be the father. Further blood tests ordered by the judge reveal that Craig isAA. The judge rules that: (a.) Susan is right and Craigmust pay child support. (b.) Craig is right and doesn't haveto pay child support. (c.) Suasan cannot be the real motherof the child; there must have been an error at the hospital. (d.) It is impossible to reach a decision based on the limited dataavailable. (e.) None of the above a mother with type Bblood----------genotype    BO   OR      ,BB child with type O blood. --------genotype   OO Craig isAA.-----------------------genotype            AA                                           BO         X       AA,                                     B      O                 A         CHILD WILL BE -----------AB      OR      O A         ANSWER: B.Craig is right and doesn't have to pay child support.Since he is AA he cannot give an O allele .TO THE CHILD

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