How do humans have various blood groups...Hence blood seems to be same or relevant among a group of animals...

Question

Tell me out how and why..??? if u know any answers..!!

Answer 1

Bleh.  Blood type is strictly genetic.  It has nothing to do with birth order or with planetary placement.

There are hundreds of markers for blood type, but most people aren't aware of most of them.

The ABO system and the Rhesus (+/-) system are the most commonly known.

Blood types are a result of specific antigens that appear on the red blood cells.  For example, people with type A blood have A antigens on their red blood cells.

If someone does NOT have an antigen (For example, an A antigen), then they recognize A antigens as foriegn and produce antibodies against them.  This causes all sorts of trouble if the wrong type of blood is injected into an individual.

No one knows for sure WHY people have different blood types, but the best hypotheses so far involve ancient diseases.  Blood types tend to be clustered geographically, and some people with certain blood types seem to be more resistant to certain diseases.  Therefore, blood types are likely an evolutionary result of ancient disease epidemics.

Answer 2

One thing about the ABO system is that if you are type A, your plasma contains anti-B antibodies.  If you are type B, you have anti-A antibodies.  People who are type O have anti-A and anti-B antibodies.  This is all based on your genetics.  The only ABO type that does not have antibodies against A or B in their blood are those who are AB, meaning their blood cells have both antigens.

By the way, we are not the only creatures on earth with blood types.  In fact, the Rh factor gets its name and abbreviation from the fact that it was discovered in Rhesus macaques.  There are hundreds of different typing systems for human blood.  Most people don't need to know about this UNLESS they are up for an organ transplant or a family member is.  When trying to find the best match possible for a transplant, multiple factors are compared.  The more matches, the better the chances for the transplant to be a success.

Type O is the oldest blood type.  Type A is the next one. both of them found all over Europe and Africa for millenia.  Type B blood originated in Asia and spread from there with trade and migration.  AB came about with more and more intermingling of groups that were once separated by barriers of land and sea.

Answer 3

People are born with their blood types.  They are A.  Or they are B.  They may be C.  It is one of the things that influences a person. They are also influenced by in which order they were born.  They are influenced by their sun placement at birth, and by the influence of the moving placement of all planets to the birth planets.  They were influenced by in which order they were born of their parents family.  People are influenced by their own health.  They are influenced by where they have chosen to live. They get along with others according to interaspects between self and each other person they interact with.  Most people don't even know themselves let alone people in their own family.