Genetic Diversity




 

Genetic diversity

Suppose a child inherits chromosomes from parents and constructs a new pair of chromosome pairs.
A child can receive an 'A' or 'a' from his mother and a 'B' or 'b' from his father. So, the child can inherit chromosomes in the following four cases.

  1. A & B
  2. A & b
  3. a & B
  4. a & b

Dad and mom give one of their pair of chromosomes to their child. There are 23 pairs of human chromosomes, so the number of chromosomes you receive from your father is 223. And the number of chromosomes a child receives from his/her mother is 223.
As a result, the number of chromosomes that the offspring has can be obtained by multiplying the two numbers.

223 × 223 = 70,368,744,177,664

In other words, in theory, you would have to give birth to more than 70 trillion children to have children who are genetically identical to each other.
But, 'identical twins' are genetically identical.