What is the basis of variability/polymorphism in DNA sequences?
What is the basis of variability/polymorphism in DNA sequences?
Somatic mutations
Germ cell mutations
Accumulation of mutations in non-coding DNA sequences
Changes in coding DNA sequences
Solution
Mutations in non-coding DNA sequences may not have any immediate effect on an individual's reproductive ability and thus tend to accumulate over generations, leading to variability/polymorphism.