Question

How do you get 0 blood type?

Answer 1

What happened was that dad and mom each passed both an O and an Rh negative to the baby. The end result is an O negative child. Each of their kids has around a 1 in 8 chance of having O negative blood. This is possible because both O and Rh- are something called recessive traits.

Step-by-step explanation:

My trusty sidekick google, i hope it helps :) <3

Answer 2

You cannot change your blood type. You are born with what you are biologically given and it is permanent.