The gene for hemophilia is sex-linked. A woman who is heterozygous for hemophilia marries a man who does not carry the gene for hemophilia. Which of the following will be true? A. Half of their children of either sex may receive the gene for hemophilia.

B. Half of their daughters may be hemophiliac.

C. All of their daughters will be carriers of hemophilia.

D. All of their sons will be hemophiliac.

i think it is dna, i'm not totally sure but i think it might be.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.