Sunday, July 12, 2009

Thw pattern of inheritance of blood groups has some practical application in medico-legal cases involving disp

a. If a child has type A blood, could both parents be of type O? Why?


b. If the mother is type A and the father is typeB, would blood tests help to determine whether a particular child belonged to them?Why?


c. If a woman has type O blood and her child has type A blood, could a man with type B blood possibly be the father of the child?why?


d. If both husband and wife have type AB blood, what possible blood types couldtheir offspring have?

Thw pattern of inheritance of blood groups has some practical application in medico-legal cases involving disp
a. No, the genotypes of the parents would be ii x ii meaning that a cross would only produce other ii children. (ii = type O blood)





b. It depends on the genotypes of the parents. For example, if the parents are both AA and BB,then a child with the genotype ii could not be their child. But, parents with Ai and Bi could have a child with ii blood. Usually, blood tests rule out parents rather than difinitively identifying the parent.





c. No. If a mother has type O (ii) then the child with A blood would have to be Ai meaning that the A would have to come from the father. He could be AB but not just B.





d. A, B, or AB. Type O blood would be the only one not possible.


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