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The genetic 'mutation' (or phenotype/genotype) that causes sickle-cell anemia didn't originate as a response to malaria. It happened and happens randomly, by simple chance. As malaria epidemics would strike some area, the people who didn't have the mutation would be less likely to survive. Thus the percent of people that had the mutation would increase, and (since it is genetic/hereditary) the percentage would quickly increase. In places where malaria was a regular hazard, the people who lacked the mutation would be rapidly selected out as the percentage of those with the mutation would have so strong a survival advantage.
The advantage was and is profound. Granted, the disease comes with a truly dreadful down-side. Regrettably, since the mutation doesn't kill you off before reproductive age, the selective pressure is simply "positive" so it only grants what seems like a genetic advantage.
What else can I help you with?
Is sickle cell anemia x-chromosome or non x-chromosome?
Sickle cell anemia is not sex linked.
What are other names for sickle cell anemia?
Hemoglobin SS disease (Hb SS)
Is sickle cell anemia a type of poikilocytosis?
Yes, sickle cell anemia is a type of poikilocytosis, which is a condition characterized by the presence of abnormally shaped red blood cells in the bloodstream. In sickle cell anemia, the red blood cells are crescent or sickle-shaped due to a genetic mutation in the hemoglobin protein.
What genetic disorder results in abnormally shaped blood?
Spherocytosis
When was sickle cell anemia discovered?
Sickle cell anemia was first described in the medical literature in 1910 by Dr. James B. Herrick, who identified the unique sickle-shaped red blood cells in a patient of African descent. The genetic basis of the disease was later elucidated by Dr. Linus Pauling in the 1940s.
Why would natural selection act against people with sickle cell anaemia in Europe?
because people in europe have not gotten used to sickle cell anemia because it is soo rare in europe
How natural selection means there is more sickle cell anemia in Africa?
Sickle cell anemia is more prevalent in Africa due to natural selection's role in conferring a survival advantage against malaria. The sickle cell trait (carrying one copy of the gene) provides some protection against the disease, allowing individuals with the trait to survive and reproduce more successfully in malaria-endemic regions. As a result, the frequency of the sickle cell allele increases in these populations, leading to higher rates of sickle cell anemia. This illustrates how environmental pressures can shape genetic traits within a population.
How do you ge sickle cell anemia?
You get Sickle-Cell Anemia by Birth,it is a genetic disorder.
Is sickle cell anemia a point mutation?
An example of point-mutation is sickle-cell anemia. Sickle-cell disease is hereditary.
Is Sickle cell anemia genetic?
Yes, Sickle Cell Anemia is in fact a genetic disorder.
Is sickle cell anemia recessive or dominant?
Sickle cell anemia is an autosomal recessive disease. Carriers have sickle cell trait, which confers resistance to malaria.
What is a genetic autoimmune difficiency in which blood cells look like a sickle It is not sickle cell anemia?
sickle cell anemia
Is sickle cells disease hereditary?
Sickle cell anemia -yes it is hereditary
Sickle-cell anemia is an example of a point-mutation?
An example of point-mutation is sickle-cell anemia. Sickle-cell disease is hereditary.
Which form of anemia is a genetic disorder?
It sounds like you are looking for Sickle Cell Anemia.
Is sickle cell anemia genetic or environmental?
Sickle cell anemia is genetic. It is an autosomal recessive disease.
When a mutation in the hemoglobin gene causes what disorder?
While technically there are more than one, the main one by far is sickle cell anemia.
