Geneticists can transfer a gene from a DNA of one organism into another through a process called A) Natural selection.
B) Genetic engineering.
C) Artificial breeding.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass