Brown eye color is a dominant trait and blue eye color is a recessive trait. What typically happens when someone inherits one allele for brown eyes and one for blue eyes?

The person has brown eyes, and brown eye color remains a dominant trait.
The person has blue eyes, but brown eye color remains a dominant trait.
The person has brown eyes, but blue eye color becomes a dominant trait.
The person has blue eyes, and blue eye color becomes a dominant trait.

A.

Explanation:

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.