7 Chromosome

7 Chromosome represents more than 5% of the total DNA in cells. People normally have two copies of this chromosome as all other non-sex chromosomes. Chromosome seven spans about 159 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 1,452 genes in this chromosome.

This medically important chromosome has been sequenced 99.4 percent. It carries the cystic fibrosis gene and genes associated with diseases such as autism and leukemia.

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7 Chromosome To 8 Chromosome