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Rh Factor and It's Inheritance

If the father...

Question

If the father of a fetus is Rh positive and the mother is Rh negative, what are the chances that there will be a mother-fetus incompatibility problem? Assume that the couple already had a first child with no medical problems.

A

100%

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B

At least 50%

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C

Less than 50%

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D

0%

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Solution

The correct option is B At least 50%
If the father is homozygous dominant (DD) the chances of the fetus being Rh positive and an incompatibility problem occurring will be 100%. If the father is heterozygous (Dd), the chances are 50%. There will be no problem if the fetus is Rh negative.

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Similar questions

Q. If the father of a fetus is Rh positive and the mother is Rh negative, what are the chances that there will be a mother-fetus incompatibility problem? Assume that the couple already had a first child with no medical problems.

Q. If the father of a foetus is Rh positive and the mother is Rh negative, what are the chances that there will be a mother-foetus incompatibility problem? Assume that the couple already had a first child with no medical problems.

Q. Rh antibody formed in Rh

-

ve mother during Rh incompatibility and develops Erythroblastosis fetalis is?

R^{h}

antibody formed in

R^{h}

-

ve mother during

R^{h}

incompatibility and develops Erythroblastosis fetolis is?

Q. If the mother is

R h^{- v e}

R h^{+ v e}

, which of the following

R h^{+ v e}

child is normally not affected?

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