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Previous Volume 331:191-193 July 21, 1994 Number 3 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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Human DNA contains many sequences of nucleotides that occur repeatedly from a few to many thousand times within the genome. Nonrepeated, or unique, sequences are, of course, each represented twice -- once on each of a pair of chromosomes. Repeated sequences vary in complexity, from the full complement of an intact gene down to isolated sequences of only one or two base pairs. For example, the -globin gene is normally present as two copies on each chromosome 16; thus, most people have four copies of this gene. There are about 200 copies of genes for ribosomal RNA in our genomes. . . . [Full Text of this Article]

References

This article has been cited by other articles:

• Mazars, E., Lesjean, S., Banuls, A.-L., Gilbert, M., Vincent, V., Gicquel, B., Tibayrenc, M., Locht, C., Supply, P. (2001). High-resolution minisatellite-based typing as a portable approach to global analysis of Mycobacterium tuberculosis molecular epidemiology. Proc. Natl. Acad. Sci. USA 98: 1901-1906 [Abstract] [Full Text]