Question

which of the following do you think contributed the most to the success of rhys gene therapy? rhys was very young at the time of the gene therapy procedure. doctors were able to supplement his gene therapy with numerous rounds of bone marrow transplants. doctors were replacing only one gene, and they only had to insert that gene into bone marrow cells. rhys illness was never severe or life - threatening.

Explanation:

Gene therapy success often depends on simplicity of the procedure. Replacing only one gene and targeting bone - marrow cells reduces complexity and potential risks. Young age alone may not guarantee success. Multiple bone - marrow transplants may introduce complications rather than ensure success. If the illness was not severe, gene therapy may not have been necessary.

Answer:

Doctors were replacing only one gene, and they only had to insert that gene into bone marrow cells.