The gene for the beta chain of normal human hemoglobin has the sequence CTC at the position for the seventh amino acid in the protein. A point mutation changing the sequence to CAC results in sickle cell hemoglobin. Use the genetic code to determine the change in the amino acid at position seven of the hemoglobin beta chain.1. glutamic acid to histidine2. glutamine to histidine3. glutamic acid to leucine4. glutamic acid to valine

true is the final answer!

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.