Question

The haploid content of human DNA is

• A. 3.3 x10${}^9$ bp
• B. 3.3 x10${}^9$ kbp
• C. 4.6x10${}^6$ bp
• D. 48502 bp
• E. 1.65 x10${}^9$ bp

Answer 1

The correct option is A 3.3 x10${}^9$ bp

The total length of the human genome is over 3 billion base pairs. The genome is organized into 22 paired chromosomes, plus the X chromosome (one in males, two in females) and, in males only, one Y chromosome. Chromosome lengths were estimated by multiplying the number of base pairs by 0.34 nanometers, the distance between base pairs in the DNA double helix. The chromosomes size ranges from 45 to 275 Mb, making the total genome size of 3286 Mb (=3.3 x10${}^9$ bp). Thus the haploid content which is 3.3 x10${}^9$ base pairs.