Question
Asked Nov 1, 2019

Consider a woman whose brother has hemophilia A but whose parents are healthy.  What is the chance that she has inherited the hemophilia allele?  What is the chance that the woman will conceive a son with hemophilia? 

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Step 1

Given that a women whose brother has haemophilia A. We know that haemophilia is an X linked recessive disorder; so the brother must have inherited it from his mother; h...

X*X (mother)
XY(father)
Parents:
X
X*
X
X*X (carrier
female)
XX (normal
female)
X
XY (normal
XtY
(hemophilic
man)
man)
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X*X (mother) XY(father) Parents: X X* X X*X (carrier female) XX (normal female) X XY (normal XtY (hemophilic man) man)

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