Human Chromosomes

Assuming the diameter of the nucleus is 5-6 micrometers (um), then chromosome 1 (the largest) will be around 3 um and chromosome 22 (smallest) would be around 0.5 um. This would make the X chromosome around 2 um and the Y chromosome will be around 0.5 um.

Another example using Chromosome 1 gives base pairs: 247,000,000 x 0.36nm = 88,920 micrometers in uncondensed form. Wrapped around their histone support proteins during mitosis, a chromosome will reach its most condensed state, shrinking down to approximately 10 micrometers in length.

Meter Centimeter Millimeter Micrometer Nanometer Angstrom Picometer
100 m 10-2 m 10-3 m 10-6 m 10-9 m 10-10 m 10-12 m
1 m 0.01 m 0.001 m 0.000001 m 0.000000001 m 0.0000000001 m 0.000000000001 m
1/100 m 1/1,000 m 1/1,000,000 m 1/1,000,000,000 m 1/10,000,000,000 m 1/1,000,000,000,000 m
hundreth of a meter thousandth of a meter millionth of a meter billionth of a meter ten billionth of a meter trillionth of a meter

 

 

 

The mission of DNA is to evolve nervous systems capable of deciphering the mission of DNA.
– Timothy Leary