The frequency of the sickle cell mutation among populations in Central Africa is Blank______ that found among African Americans.Multiple choice question.equal tolower thanhigher than

The allele for the sickle cell mutation is most common in Blank______.Multiple choice question.AmericaSouthern AfricaCentral AfricaNorthern Africa

The sickle-cell anemia allele is maintained at relatively high frequencies in some human populations because Blank______.Multiple choice question.the beta-globin gene mutates very frequently in those populationsheterozygotes for the disease allele are resistant to malariathe beta-globin gene is not subject to natural selection

A young boy of African descent is taken to hospital with respiratory failure. His haemoglobin is 60 g/L.  Which of the following is the most likely diagnosis?Question 8Select one:a.Hb SS (sickle cell disease)b.beta thalassemia majorc.alpha thalassemiad.Hb C diseasee.Hb SA (sickle cell trait)

Which of the following is true?1 pointNone of the answers providedSickle cell anemia is an infectious disease of the lung.Sickle cell anemia confers almost 100% resistance to malaria.A mutation in one gene copy of the hemoglobin coding gene is sufficient to cause sickle cell anemia.

The amount of genetic variation present in naturally occurring populations is Blank______.Multiple choice question.insignificantpractically nonexistentvery littlesignificant