Can you know youre blood type lacking getting it drawn?

Can you know youre blood type lacking getting it drawn?
Yes. Go on line and look up blood type charts. The problem is you would enjoy to know what blood type your parents are. The best way to draw from your blood type for FREE is to go administer blood!
your parents will know ur blood type/if they r not alive/i do not know
Yes, you have human blood.
no I reflect on?
If both of your parents are Type O (and there is no contest of paternity or adoption) you will also be a Type O next to the O/O genes. Two Rh positve parents can have Rh positive or Rh refusal children, but two Rh negative parents will other have Rh distrustful children. Type O individuals are always O/O, but Type A individuals could be A/O or A/A, Type B individuals could be B/O or B/B and Type AB individuals are A/B.
So, lacking blood work - only the first scenerio can be without risk assumed - all other situations require carrying out tests.
If both of your parents are O Negative - you can know both your type and Rh without any blood work !