Sickle cell disease results from an amino acid change from valentine to glutamic acid. the result of this amino acid change is a deformed hemoglobin protein that does not carry oxygen well. what type of genetic mutation caused the amino acid change in a person with sickle cell anemia? a. frameshift mutationb. silent mutationc. nonsense mutationd. missense mutation

About which of these did darwin have a poor understanding? a) that much of the variation between individuals in a population is inherited b) the factors that cause individuals in populations to struggle for survival c) the sources of genetic variations among individuals d) that individuals in a population exhibit a good deal of variation e) how a beneficial trait becomes more common in a population over the course of generations