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Biology, 04.08.2019 11:30 timithythaxton
There are a large number of genetically based blood group systems that have been used for typing blood. two of these are the rh system (with blood types rh+ and rh-) and the kell system (with blood types k+ and it is found that any person's blood type in any one system is independent of his or her blood type in any other.
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