The number of protons within the atom's nucleus is called atomic number and is equal to the number of electrons in any neutral atom. each atomic number identifies a specific element, but not the

C.Isotope

Each atomic number identifies a specific element and the number of protons and electrons. The atomic number does no identify the isotope, which may have a variety of neutrons: c-12 and C-1 are examples.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.