Are neutrinos and anti-neutrinos the same thing?

Question

Neutrinos are subatomic particles with no electrical charge. Anti-matter has the same mass, spin, etc. as that of regular matter except the charge of anti-matter is opposite to that of the normal matter. As neutrinos don't have a charge, shouldn't both be the same thing?

Answer 1

Nobody knows. Like photons and the Z boson, neutrinos could be their own anti-particle. It would be the only fermion[*] to be like that and would be called a Majorana fermion. However, neutrons are not their own anti-particles despite having no electric charge. Anti-neutrons are made of anti-quarks and annihilate with normal neutrons. Neutrinos could be either.

[*] Roughly, fermions are matters particle as opposed to a bosons, which are particles that mediates interactions.