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Can identical twins have different blood types?

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Brothers and sisters can have different blood type same way fraternal twins can have different blood types . In fact the whole family can have different blood group, Yes if they are fraternal twins and, although much less common, it is also even possible if they are identical twins. read more

I am not aware of reports of monozygotic twins without identical blood types. Monozygotic twins are identical twins and have therefore the same blood type. THe only exception I could imagine is in case of postzygotic mutation. in this case identical twins can develop non-identical characteristics. read more

It is a different story if the twins are identical. Identical twins come from the same egg and the same sperm and so share nearly identical DNA. For identical twins to have different blood types, something needs to happen to one twin’s DNA. Small changes in DNA can and do happen so identical twins do have a few differences. read more

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‘World’s most identical twins’ want to be pregnant by the ...
Source: nbc4i.com