Also known as condensation, it is a chemical reaction involving the joining together of two molecules with the removal of a molecule of water. Molecules which are formed in this way can usually be broken down by the addition of water molecules, a process known as “hydrolysis.” A chemical reaction involving the removal of a water molecule.
Sickle cell anemia is caused by a single letter mutation so transcription will lead to synthesis of a different <u><em>mRNA</em></u> molecule . The different mRNA molecule will lead to a different <em><u>protein</u></em> where a single amio acid is different(there is valine instead of glutamic acid)