Why Do Humans Have Different Blood Types?

[longknife]

We take it for granted. How many of us have ever asked this question?

Although a concrete reason for the existence of ABO genes that determine blood types is not known, even after a hundred years of discovery, scientists believe that there must be an evolutionary advantage. Interestingly, in 1952 Bombay, doctors reported people that had none of the recognizable blood types normally found in humans. This phenomenon could mean that there is no evolutionary advantage after all, but these are very rare. Claims have been made that people from group A have the worst hangovers and group O have the best teeth, for example, but these associations are probably coincidental at best.

And interesting piece @ https://www.scienceabc.com/humans/humans-different-blood-types.html

 

[abu afak]

We take it for granted. How many of us have ever asked this question?

Although a concrete reason for the existence of ABO genes that determine blood types is not known, even after a hundred years of discovery, scientists believe that there must be an evolutionary advantage. Interestingly, in 1952 Bombay, doctors reported people that had none of the recognizable blood types normally found in humans. This phenomenon could mean that there is no evolutionary advantage after all, but these are very rare. Claims have been made that people from group A have the worst hangovers and group O have the best teeth, for example, but these associations are probably coincidental at best.

And interesting piece @ https://www.scienceabc.com/humans/humans-different-blood-types.html

Blood Types (ABO) pre-date humans by millions of years, and exist in other primates like Gorillas.
`

 

[BasicHumanUnit]

Blood Types (ABO) pre-date humans by millions of years, and exist in other primates like Gorillas.
`

But that doesn't move us towards what was asked....."Why do humans have different blood types"?

A very good question imo.
And I would also wonder if blood type ratios vary by race?

 

[abu afak]

But that doesn't move us towards what was asked....."Why do humans have different blood types"?
A very good question imo.
And I would also wonder if blood type ratios vary by race?

Yes, it does help.
His question implies ONLY humans have ABO blood types.
Without knowing it was much older and trans-species polymorphic, one might venture many wrong guesses.
(ie, something a creationist might imply is ID)

Read and learn:
abo blood types polymorphic trait - Google Search

`

 

[Gracie]

Aliens. Different planets or evolution once they arrived all from one planet other than earth.

 

[BasicHumanUnit]

But that doesn't move us towards what was asked....."Why do humans have different blood types"?
A very good question imo.
And I would also wonder if blood type ratios vary by race?

Yes, it does help.
His question implies ONLY humans have ABO blood types.
Without knowing it was much older and trans-species polymorphic, one might venture many wrong guesses.
(ie, something a creationist might imply is ID)

Read and learn:
abo blood types polymorphic trait - Google Search

`

Oh, ok. my bad

 

[harmonica]

..different evolutionary trees maybe
..it is just logical that the earth could not have been populated by just one group/one pair
..so you have many different evolutionary trees in different areas--many groups of pre-humans and/or humans from groups that were from ''different'' pre-humans
...maybe some of them intermixed/maybe not
..many different breeding possibilities
..this could account for the very, very slightly different blood types
...and this is another question for the theist --why different blood types?
..if not evolution, why different blood types?

 

[harmonica]

.....there might not be a need for evolutionary advantage in blood type--but there would be for brain size/eye shapes/upright walking/etc

 

[Asclepias]

We take it for granted. How many of us have ever asked this question?

Although a concrete reason for the existence of ABO genes that determine blood types is not known, even after a hundred years of discovery, scientists believe that there must be an evolutionary advantage. Interestingly, in 1952 Bombay, doctors reported people that had none of the recognizable blood types normally found in humans. This phenomenon could mean that there is no evolutionary advantage after all, but these are very rare. Claims have been made that people from group A have the worst hangovers and group O have the best teeth, for example, but these associations are probably coincidental at best.

And interesting piece @ https://www.scienceabc.com/humans/humans-different-blood-types.html

Because humans have different genetic variations.

 

[longknife]

Blood Types (ABO) pre-date humans by millions of years, and exist in other primates like Gorillas.
`

But that doesn't move us towards what was asked....."Why do humans have different blood types"?

A very good question imo.
And I would also wonder if blood type ratios vary by race?

Check out the link. They do!