Which of the following statements best describes the major difference between metaphase 1 of meiosis and metaphase of mitosis? (a) in metaphase 1 tetard srts of homologous chromosomes stay together as they line up along the center of the cell (b) in metaphase homologous chromosomes sre separated as each sister chromatid set os pulled to one end of the cell (c) im metaphase sister chromatids are separated and pulled apart to form a total of four new haploid cells. (d) in metaphase 1 sets of sister chromatids line up at the center of the cell and spindle fibers pull them apart.

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

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.