Which best explains why males have a greater probability of being color blind than females?

Males only have to inherit the allele on the Y chromosome to be color blind.
Males only have to inherit the color blindness allele once to show the trait.
Males have to inherit two copies of the color blindness allele to show the trait.
Males have to inherit the allele on two X chromosomes to be color blind.

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o