Two teams of biologists are collaborating in a bid to unravel the 1 billion bases that make up the turkey's 40 chromosomes. One team, led by biologist Dave Harry of Nicholas Turkey Breeding Farms in Sonoma, California, has already published the first set of 100 or so "signpost" genes— markers around which a map of the entire genome can be assembled. Another second team, led by Dave Burt, head of bird genomics at the Roslin Institute in Edinburgh, Scotland, will publish a similar paper identifying another 100 or so markers.