What in the reproductive process is so successful in causing 50% of each parents DNA to turn into a normal human?

Question

What in the reproductive process is so successful in causing 50% of each parents DNA to turn into a normal human?

In: 3

Answer 1

Every person carries a double complement of DNA. During reproduction a person’s double complement is first re-shuffled for better random results (random genes are moved from one complement to another and back), and then divided into two single (randomized) complements. Every parent gives one single complement of DNA to a child, who thus gets a normal double complement of DNA again.