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The sickle cell allele can be maintained in the central African population, above the frequency of gene mutation (balancing selection), because the heterozygous sickle cell individuals have an advantage in lifespan, in this malaria stricken region, over the homozygous alternatives. Homozygous sickle-sickle individuals die early from the sickle cell disease. Homozygous nonsickle-nonsickle die early from malaria. The heterozygous sickle-nonsickle have a higher survival against malaria and therefore the sickle cell allele is balanced selected.
What else can I help you with?
How does the rain forest affect migration patterns in central Africa?
The fertile soils of the central rain forest draw people.
How could furniture buyers in the US affect lumber exports in central Africa?
because furniture's have already lumber (or wood) that comes from the USA.
How did the migration of the Bantu speakers affect culture in the areas of central and southern Africa?
The migration of the Bantu speakers affected culture in the areas of central and southern Africa in a huge way. Some of the activities like farming were introduced and the Bantu language and other cultural values also spread rapidly.
How did European colonialism affect africas culture?
it had a negative affect in the farming economy if Africa
How does selection affect natural selection?
Organisms are affected by Natural Selection because Inherited characteristics affected the likelihood of an organism's survival and reproduction.
How does a subscript in a chemical formula affect balancing chemical equation?
When balancing a chemical equation, you multiply the subscripts in a chemical formula times the coefficient in front of the formula to get the total number of atoms of each element.
How does natural selection affect survival?
Natural selection is the process which determines the shark's evolution. It is humankind that is threatening the sharks' survival.
Which does natural selection affect populations or individuals?
Populations evolve, but individuals are selected. Natural selection affects individual organisms.
Is closer to the equator Africa or the US How does this affect the climate in each area?
africa
Which is closer to the equator Africa or the US how does this affect the climate in each area?
africa
How does the central rain forest affect migration patterns in Central Africa?
The central rainforest in Central Africa creates a barrier that can influence migration patterns by restricting movement for some species while serving as a navigational landmark for others. The dense vegetation and challenging terrain of the rainforest may divert or guide animal migration routes, impacting the distribution of species across the region. Additionally, the abundance of resources in the rainforest can attract certain migratory species, influencing their movement patterns.
How does Evolutionary Trends affect Natural Selection?
Adaptation for stronger shells.
