yes there are two concentrations of sickle cell
they are:
sickle cell trait: co-dominance is established and only 50% of your cells are malformed
sickle cell anemia: sickle cell is totally dominant and all cells are malformed, this only happens when both alleles are coded for sickle cell
Yes. People with only one allele for sickle cell anemia develop a milder form of the disease than people with two alleles.
malaria
rr since sickle cell is a recessive trait.
sickle cell anemia. If you are only heterozygous for this disease it is simply called sickle trait.
true
homozygous recessive (rr) & Heterozygous (Rr) homozygous recessive (rr) & Heterozygous (Rr)
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.
malaria
C. Sickle-cell anemia
Yes. Heterozygous dominance offers a way to preserve the mutated allele.
Sickle cell trait carries a lower risk of serious malarial disease, without the signs and symptoms of sickle-cell anemia.
Sickle Cell Anemia, in it's heterozygous form it does not present as the disease and it gives the carrier resistance to malaria.
because ur moma said so