Comments on Counter Minds: Is A always better than B? Under these situations ...

If the blood proteins give an antibacterial resist...

2008-07-15T14:13:11.694-07:00

If the blood proteins give an antibacterial resistance (which they do) and if the person who has that proper blood type survive, we found an explanation for "why a blood type is needed".

But if you think that there are different types of blood proteins, and only the ones that were beneficial survived, you wonder why there was a diversity at all? (and better yet, how?)

Therefore my point at "nature favors diversity" is not to describe why people have blood types. It was more to interpret the reasons for the differences in the blood types. As you point out, the antibody resistance is clearly one if which.

I do agree though, this is not an adequate answer. :) That's why I can't wait for the examples of how blood proteins might have been selected for -- thanks for your interest.

The answer "nature favors diversity" really does n...

2008-07-15T13:06:27.417-07:00

The answer "nature favors diversity" really does nothing to explain why people have different blood types.

Its like answering the question "how does a light switch work?" by saying that "If it didn't no one would have them in their house!"

There must have been an event where people with that mutation were given greater fitness and were able to outbreed as a result.

I have been told that those blood proteins give an antibacterial resistance. It would make sense therefore that in a region where this is important that would win out. In other regions where bacteria isn't as big an issue you could be O.

I know someone who has studied this. I will direct her to your blog. Maybe she has some examples of how blood proteins have been selected for.