Question

Heya Brainly People ✌✌❤❤

Which one of the following conditions though harmful in itself , is also potential saviour form a mosquito borne infectious disease?

(1) Thalassaemia

(2) Sickle cell anaemia

(3) Pernicious anaemia

(4) Leukaemia

NO SPAM ❌❌❌❌​

Answer 1

ANSWER-

● Sickle Cell Anaemia though harmful in itself , is also potential saviour form a mosquito borne infectious disease.

● So, the correct option is (2)

REASON :

》Persons suffering from Sickle Cell Anaemia has protection over malarial parasite.

》Actually the sexual stage of the malarial parasite, Plasmodium, occurs in RBCs.

》Normal RBCs ate biconcave in shape. But in a host suffering from the disorder sickle cell anaemia has deformed RBCs, i.e, sickle shaped RBCs. So, the malarial parasite can't complete their sexual stage here and thus gets inhibited.

》Hence, a person having the disorder of sickle cell anaemia is a potential saviour form a mosquito borne infectious disease.

Answer 2

Hey mate !!

Those who are carriers for the sickle cell disease (with one sickle gene and one normal hemoglobin gene, also known as sickle cell trait) have some protective advantage against malaria. Hence, the frequencies of sickle cell carriers are high in malaria-endemic areas.So, the correct answer is 'Sickle cell anaemia'.

Hope this will help you...