Ehlers-Danlos syndrome may be classified into six major types.
Genes are the smallest units of the hereditary material.
Hundreds of genes are packaged on chromosomes which are found in every cell of the body. Humans have 23 pairs of chromosomes in each cell. Twenty-two of the chromosomes are called autosomes. The 23 rd pair of chromosomes determines the sex of the individual. They are known as autosomal dominant and autosomal recessive.