The other 22 chromosome types, i.e. those which are not sex-determining chromosomes, are called autosomes. Some JMDs are inherited as if caused by an autosomal dominant gene, while others are inherited as if caused by an autosomal recessive gene. Each gene is located at a specific position on a specific chromosome. Segments of DNA can be isolated and copied. C. A gene is said to have been sequenced when the exact order of A's, T's, G's and C's in the gene have been determined.
Genes typically have a sequence several hundred to several thousand nucleotides long.