Write information on sickle cell anaemia and Maleria.
Answers
Answer:
anemia is due to less blood and malaria due to mosquito bite
Sickle cell anaemia and Malaria:-
=> Just because of Anemia individuals, homozygous for sickle cell anaemia may die at an early stage.
=> The RBC becomes sickle shaped & the individuals in which heterozygous condition is present for this character only.
=> In this type of RBC, malarial parasite do not have a normal growth and hence individuals gets resistant to malaria.
=> In this people with good heterozygous condition have better chances of survival, hence these are taken by nature.
=> In this way this process of natural selection takes responsibility of abnormal form of hemoglobin along with the normal form in a region in the cases where malaria is common.
=> It means we can say that preservation of genetic variability is maintained by the selection of heterozygote which we say balanced polymorphism.