Where does blood type A originate from?
Blood type A is the most ancient, and it existed before the human species evolved from its hominid ancestors. Type B is thought to have originated some 3.5 million years ago, from a genetic mutation that modified one of the sugars that sit on the surface of red blood cells.
Which blood type has the highest percentage?
O+ O+ is the most frequently occurring blood type and is found in 37 percent of the population. O- is found in six percent of the population. This blood is the second most frequently occurring blood type. Thirty-four of every 100 people have A+.