Because transplants are most likely to be successful if the organ comes from a close relative.
If you needed an organ transplant, it would help to know who your father is because transplants are most likely to be successful if the organ comes from a close relative. You might be able to find a donor on your father's side if you can't find one on your mother's side.
An organ transplant is a surgical operation in which a failing or damaged organ in the human body is removed and replaced with a functioning one
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