Question

What does the relationship between genetic traits and the prevalence of diseases such as malaria and smallpox illustrate?

Answer 1

The relationship between genetic traits and the prevalence of diseases such as malaria and smallpox illustrate, the way human biological diversity reflects the adaptation to environmental stresses such as diseases , diet and climate.

For example high prevalence of blood group O studies example in country like india show that blood group O has a less sever malaria as compared to blood group A, B andAB. This suggested that individual with blood O who live within area which is prone to malaria have high resistance to malaria

Answer 2

The relationship between genetic traits and the prevalence of diseases such as malaria and smallpox illustrates the ways in which human biological diversity reflects adaptation to such environmental stresses as disease, diet, and climate.
Positive selection increases the prevalence of genetic variants that improve survival and fertility.