A "googol" is the term given to the number 10100 (that is, the number 1 followed by 100 zeros). The DNA molecules in the chromosomes in a human sperm or egg contain approximately 3 × 109 (3 billion) base pairs. How many googol's worth of genetic information could be encoded in human chromosomal DNA molecules?
Answer
806 × 107 googols. In other words, the number of theoretically possible human DNA sequences is about 20 million googols.