Why is o the most common blood type

In the U. S. the average distribution of blood types is: O-positive: 38 percent. O-negative: 7 percent.Ma

Explanation: hope I get brainliest:D

answer; a male inherits only one allele of the x-linked gene controlling hair color;

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

hope this