Research Article: Evolution’s “Molecular Clock”: Not So Dependable After All?

Date Published: August 17, 2004

Publisher: Public Library of Science

Author(s): unknown

Abstract: None

Partial Text: DNA mutates, and it’s a good thing it does. If it didn’t, there could only be one kind of life, not the millions there are today, and species could not adapt to new challenges. This is because mutations in genes—the coding portion of DNA—are the raw material for evolution. However, genes make up a surprisingly small fraction of our DNA. If the genome were a cookbook, its 30,000-odd genetic recipes would be scattered among millions of pages of apparently meaningless nonsense.



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