Heterozygotes - those with sickle cell trait - show resistance to malaria. Therefore the survival rate of those with one sickle cell allele is higher than those with none - allowing for the trait to be passed on more frequently.
This recessive mutation is one amino acid difference in an allele of hemoglobin. The mutation causes the red blood cell to crenelate and is very debilitating and eventually fatal in homozygous recessive condition. The heterozygous condition confers some advantage in malaria country, especially to the young, by crenelating a good percentage of the red blood cells which make them almost impervious to the Plasmodium protist. Naturally, when homozygous recessive one can die from the sickle cell trait, when homozygous dominant one can die from malaria and when one is heterozygous for the trait the mutated allele produces enough crenelated RBC's to confer survival and reproductive advantage. Especially among the young in which malaria is very detrimental.
The extent to which it provides immunity to malaria.
Heredity is a factor in some diseases that affect specific populations ranging from hemoglobin disorders to Diabetes to Tay-Sachs.
Most countries in the African Transition zone have a MUSLIM population in the north and a NON-MUSLIM population in the south. Also, depending on your teacher you can substitute that with SEDENTARY and NOMADIC.
Lions
It was a selective advantage for survival during droughts.
The southern African country with the highest percentage of Christian inhabitants in the region is Namibia. Approximately 90% of the population identifies as Christian, primarily Protestant.
The official percentages of the US population sporting A positive blood are different between ethnic groups. Caucasians are represented 33%, while African Americans only 24%.
African American and Hispanic are greatly affect by sicklecell.
The population of African Union is 967,810,000.
Lagos, Nigeria is the African city with the largest population.
The population of South African Breweries is 9,400.
The population of East African Community is 131,862,000.
African Population Studies was created in 1986.
African Sun Limited's population is 2,250.
African Rainbow Minerals's population is 9,643.
The population of African Rainbow Minerals is 2,010.
The population of African Diamond Producers Association is 7.
Netherlands-African Business Council's population is 2,011.
The population of Netherlands-African Business Council is 8.