Why are the properties of daughter organisms developed from a zygote not identical to those of the parent?

Subsidiary organisms are always different from parental organisms. Only some of the traits of the parents, some pathologies, and so on can be inherited. This is due to the fact that during sexual reproduction, the genetic information of the mother and father is mixed. A unique DNA is already created in the offspring, which consists of the DNA of both the mother and the father. Children often look like one of the parents. Birthmarks can also be transmitted. This is a fairly common occurrence when a child has a birthmark in the same place as one of the parents.