Question

Here is a fun exercise to drive this point home. pull out your calculator, and try your hand at this: when you were conceived, what were the odds that of the many possibilities, your parents would come up with you?

Answer 1

The number of possibilities is  2n, where n= the number of homologous pairs.
The homologous pairs is the place where The maternal and the paternal chromosomes exist. Since we would inherit the chromosomes from both our mom and dad, the percentage would be twice the number of homologous paris that they both contributed