9 Chromosome

9 Chromosome represents about 4.5% of the total DNA in cells. People normally have two copies of this chromosome as all other non-sex chromosomes. Chromosome nine spans about 149 million base pairs. Base Pairs are two molecules (nucleotides) on opposite DNA strands that are connected. Adenine (A) forms a base pair with thymine (T), as does guanine (G) with cytosine (C) in DNA. Base pairs is how DNA is measured. There are about 1,148 genes in this chromosome.

This is a highly structurally polymorphic chromosome. It contains the largest autosomal block of heterochromatin, which is heteromorphic in 6-8% of humans, whereas pericentric inversions occur in more than 1% of the population.

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9 Chromosome To 10 Chromosome