From The School of Biomedical Sciences Wiki. Complementary base pairing is the phenomenon where in DNA guanine always hydrogen bonds to cytosine and adenine always binds to thymine. The bond between guanine and cytosine shares three hydrogen bonds compared to the A-T bond which always shares two hydrogen bonds.
I think that minor shielded should not donate one of their kidneys because some genetic kidney diseases won’t have started to cause symptoms yet in young children and so it’s hard to know if their kidneys may be affected by diseases
