Question

Can two people be exactly alike?

Answer 1

Genetic variation

1. It is not possible for two persons to be exactly alike or genetically 100% similar.
2. Every individual even twins has some degree of variation in their genes.
3. These genetic variations may have risen due to environmental factors.
4. Usually, in humans, variation plays a major role in differentiating the parental DNA from its offspring.
5. The mutation is also a reason why genetic diversity arises even in individuals belonging to the same family.