Describe a disease besides HIV where Evolutionary Thinking i

Describe a disease besides HIV where Evolutionary Thinking is useful. Please be specific in giving the example. 200 word expectation.

Solution

Lactose intolerance is a disease besides HIV where Evolutionary thinking is useful.Research has found out that a population takes time to adapt to changes that include absorption of milk sugar lactose.It is found that lactose gene is expressed in infants in humans but that expression stops after weaning.One probable reason for this could be selective advantage in maintaining the lactose gene expression.At the same time it has been reported that a few minority of people in their adulthood can express the lactose gene This is seen in some populations in Western India, Europe and Africa.Thus even if the ancestral human population could digest milk after weaning, recently evolved populations has the ability to do so.A single autosomal dominant gene is responsible to digest milk after weaning.The number of the dominant genes i.e frequency increases at a faster rate during selection pressure rather than the recessive genes.