How many girls would have normal blood clotting and not be carriers of the hemophilia gene?
I put NONE.
==> correct; their daughters would either be XN Xn or Xn Xn, so either carriers or have disease.
- How many of the girls would have normal blood clotting and would be carriers of the hemophilia gene?
I put ONE.
==> correct; see above (it could still be both daughters or none of them, there is just a 50% chance of this phenotype).
- How many of the girls would have hemophilia?
I put NONE.
==> Not correct; 50% chance that a daughter will have hemophilia, so ONE would be a better answer (although mathematically incorrect)
- How many of the boys would have normal blood clotting?
I put ONE
==> A boy would be XN Y (healthy) or XnY (hemophilia). Correct.
- How many of the boys would have hemophilia?
I put ONE.
==> correct; see above.