How can the knowledge of the human genome be useful for in-vitro fertilization techniques? a) genes with the desired traits can be introduced into the sperm of infertile males. b) the genes that cause infertility can be removed from the female ovum. c) proteins can be injected into infertile individuals to increase fertility. d) disease-free sperm and ova could be identified and used.

I believe the answer is A

the only answer that would make any sense to me is the first one.

answer; a male inherits only one allele of the x-linked gene controlling hair color;

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.