system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Bone marrow transplants for leukaemia sufferers results in the patient producing new blood that is genetically the same as the donor. If a Muggle received marrow from a compatible wizard donor could they potentially gain some magical ability from it?

I'm don't know if wizards can cure leukaemia but if not I could envision a plausible scenario where a muggle born wizard is the best compatible donor available for a non-magical sibling and having no hesitation about going through the procedure for them. Given the emphasis that the wizarding community places on the magical nature of wizard blood (indeed their blood has been involved in a few spells) and the established fact that magic has a genetic basis then a muggle who has received marrow from a wizard will now be producing genetically pure wizard blood.

Could this potentially open the door to some aspects of magical ability to them?
gpt
Wizard blood, while containing magic, doesn't necessarily mean it is the source of magic.

And we have no idea how much epigenetic is involved in gaining the magical talent, or if genetics is even involved at all. For all we know, even if you clone a wizard, the clone might not have magic.