3 Chromosome is the human chromosome related to Autism. People normally have two copies of this chromosome as all other non-sex chromosomes. Chromosome three represents 6.5% of DNA in cells, spanning about 200 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 1,469 genes in this chromosome.

Sequencing chromosome 3 was an international collaboration among teams from the United States. Germany and The People's Republic of China.

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3 Chromosome To 4 Chromosome