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Sickle cell anaemia has not been eliminated from the African population because
[2006]
- a)it is not a fatal disease
- b)it provides immunity against malaria
- c)it is controlled by dominant genes
- d)it is controlled by recessive genes
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Sickle cell anaemia has not been eliminated from the African populatio...
In sickle cell anaemia RBCs become sickle shaped which are not supportive for the growth of malarial parasite Plasmodium so it provides immunity against malaria disease.
Most Upvoted Answer
Sickle cell anaemia has not been eliminated from the African populatio...
In sickle cell anaemia as the name suggests, the RBC becomes sickle like( in shape).
The RBC become brittle and often break down.
The patients of sickle cell anaemia and sickle cell trait (the heterozygous condition) do not suffer from malaria because of lack of space, deficiency of oxygen and deficiency of pottasium ions.
Sickle cell anaemia is thus observed more commonly in Africa because it saves life of a patient suffering from malignant malaria caused by plasmodium falciparum which is frequently also observed there.
It can be viewed as a case of natural selection where the patients without sickle cell anaemia or trait die with malignant malaria while those who have it survive.
The RBC become brittle and often break down.
The patients of sickle cell anaemia and sickle cell trait (the heterozygous condition) do not suffer from malaria because of lack of space, deficiency of oxygen and deficiency of pottasium ions.
Sickle cell anaemia is thus observed more commonly in Africa because it saves life of a patient suffering from malignant malaria caused by plasmodium falciparum which is frequently also observed there.
It can be viewed as a case of natural selection where the patients without sickle cell anaemia or trait die with malignant malaria while those who have it survive.
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Sickle cell anaemia has not been eliminated from the African populatio...
Because plasmodium RBC ko destroy kr deta h n pr sickle cell anaemia vale prsn ki to already destroy hoti h to use maleria hoga hi nhi
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Sickle cell anaemia has not been eliminated from the African population because[2006]a)it is not a fatal diseaseb)it provides immunity against malariac)it is controlled by dominant genesd)it is controlled by recessive genesCorrect answer is option 'B'. Can you explain this answer?
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