Biochemistry 4th Edition by Reginald Garrett, Charles Grisham

Exercise 16

Calculate the length of a nucleotide sequence whose expected frequency is once per haploid human genome
The haploid human genome consists of 3 × 109 base pairs. Using the logic in problem 15, one can calculate the minimum length of a unique DNA sequence expected to occur by chance just once in the human genome. That is, what is the length of a double-stranded DNA whose expected frequency of occurrence is once in the haploid human genome