Hemophilia is a blood clotting disorder that is a sex-linked trait carried on the x chromosome. if a woman with hemophilia and a man without the disorder have two sons and two daughters, how many of their children would have hemophilia? a.none b.one c.two d.four

c.two

Haemophilia is X-linked and usually considered recessive - it is only manifested when in woman exists two X chromosomes carrying the haemophilia allele, or when in man exists one X chromosome, as in man there is only one X chromosome. If the mother has haemophilia, it means that she will always pass to her generation an X chromosome that has the allele for haemophilia. The father does not have haemophilia which means he does not have an X chromosome with the haemophilia allele, therefore, he will either pass an X chromosome without the haemophilia allele to a daughter or a Y chromosome to a son.
The two sons would have haemophilia because the only X chromosome they would get would be from their mother. The daughters, on the other hand, would not have haemophilia because they only get an X chromosome with the haemophilia allele - from their mother, while from their father they would get an X chromosome without the haemophilia allele.
Two of their children would have haemophilia.

Metabolism involves either using energy to build organic molecules or breaking down organic molecules in which energy is stored. ... Therefore, an organism's metabolism is part of Earth's carbon cycle.

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