What is the production of an offspring throught the combination of egg and sperm

The combination of egg and sperm gives rise to a zygote. Sexual reproduction is the process by which an egg and a sperm unite to form a zygote. In this method of reproduction, half of the chromosomes arises from the female parent and half from the male parent. The phenomenon of crossing over and independent assortment occur through this process which leads to genetic diversity. Hence, the offsprings produced are not genetically identical to the parent cells and to each other.

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.

the answer is b.) hydrogen bonds between bases.