Question

I want to know that why do we have different blood groups and what will happen if we have same blood group please tell me I will mark as brainliest answer...but don't Google this​

Answer 1

Answer:

The answer is as follows

Explanation:

We have different blood groups because this will help help when we donate our blood to others. If the donor is positive A and the patient is Positive B, It will not result in a good manner because if they transfer like this, Diseases are likely to spawn in the body. Carl Lansteiner discovered blood groups

Answer 2

Answer:

Different people have different blood group due to his DNA