Answer :
Answer:
incomplete dominance
Explanation:
Keisha has inherited one recessive gene for the sickle-cell trait along with one normal dominant gene. As a result of this incomplete dominance, she does not have sickle-cell anemia. Since sickle-cell anemia is expressed by a recessive gene, there has to be a homozygous recessive for the Keisha to have sickle-cell anemia but in this case she has one recessive allele and a normal allele which exhibits incomplete dominance. Additionally, being a carrier of the sickle-cell allele confers on individuals a resistance to malaria