Question

In an experiment, two fly populations are separately maintained for many generations. Population a contains closely-related individuals. Population b contains a set of unrelated individuals. Over many generations it is observed that the fitness of individuals in population a is lower than the fitness of those in population
b. Why?

Answer 1

Explanation:

In generation B , there DNA sequence changes over the generations and new Gene's were introduced in young ones because of highly diversity of genetics in population. Hence they were able to survive and are fit. But in generation A they are closely related with each other so their gene pool is not diverse and new type of Genes were not introduced to them and their DNA does not contain any gene which make them able to survive against diseases and environment. Hence fitness in generation A is very less compare to generation B.