In three to five sentences, explain why sickle cell disease became so prevalent in certain East African populations.
Please hel

A research study by Dr. Tony Allison proved that there was a connection between infectious parasitic disease, malaria and genetic disease, sickle cell anemia. As the malarial parasite was more common in East Africa, hence sickle cell became more prevalent in Est Africa.  After collecting  samples, Dr. Tony Allison found that children carrying the sickle  cell allele had a lower parasite count, as if they were  partially protected against malaria.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

the answer would be..

b. sucking