[IB Biology SL at GHS: Genetics Reviews]
10. In the fairy tale country of Rexatopia, it is a royal decree that only women of royal blood (1st or 2nd cousins) can marry a prince or king. For that reason, the royal persons or Rexatopia have become inbred and many royals thus have or carry the recessive bleeding disease known as Hemophilia.

Using the chart at right, determine whether Queen Alicia has hemophilia or not.

a) Queen Alicia does not have hemophilia.

b) Queen Alicia is heterozygous for hemophilia, so she is a carrier but does not have the disease. (She has a H & h on her X chromosomes.)

c) Queen Alicia has hemophilia.

d) Because she is queen, it is forbidden for her to get hemophilia.

 

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Slichter