Explain at the molecular level why blood types A and B are dominant to blood type O?

Answer 1

Blood type A has the genotypes AA or AO. Blood type B has the genotypes BB or BO. Blood type O can only be OO.

Type O means without antigens A or B. It is double recessive.

Answer 2

A blood type has genotype AA and AO. B blood type has genotype BB and BO. O blood type only have OO. The A and B more dominant to O, so only the A or B character is shown.
when Blood type A or B meets O, Only A and B characteristic is shown

Answer 3

Blood types A and B are only inherited if dominant, either heterozygous or homozygous.
E.x:
A A
____________
A / A A A A = 100% Homozygous Dominant
____________
A / AA AA


A A
____________
A / AA AA = 50% Homo Dominant, 50% Hetero
____________
i / A i Ai


A i
____________
A / Ai Ai = 100% Heterozygous Dominant
____________
i / A i Ai



And it is the same for Bloo type B.


In oder to have blood type O, both parents must be recessize homozygous ii. Plus, type O can give blood to anyone, but only receive blood from another type O.

Answer 4

Blood type O is more ressesive to A and B who share dominace. I know it has something to do with the receptor protein on the blood cell.

Answer 5

blood types a and b are so called because they contain a or b protiens. o is void of both and is resessive which means that even if there is someone with o in your ansestors it will probably taken over by either a or b or both.

Answer 6

I am blood = O reg neg neither of my parents were they were A & B and my cousins are the same must come from Grandparents