07.21.09
Lampreys: altering genomes
Growing Sea Lamprey Embryos Dramatically Alter Genomes, Discard Millions Of Units Of DNA
ScienceDaily (July 21, 2009) — Researchers have discovered that the sea lamprey, which emerged from jawless fish first appearing 500 million years ago, dramatically remodels its genome. Shortly after a fertilized lamprey egg divides into several cells, the growing embryo discards millions of units of its DNA.