But whose genes are regulating the hormones?
Dr. Venter has prepared a "humanized" mouse genome, a version whose genes are in the same order as people's.
The chemical components of this material are shown as letters superimposed on the backs of anonymous people, whose outward appearances are different but whose genes are virtually interchangeable.
This month, she is scheduled to be bred with a genetically suitable male from the Minnesota Zoo--one whose genes are not already widespread in American zoo populations.
To begin with, the experiments, at Texas A&M University, are a salutary reminder that cloning can never provide what many people expect of it, namely a precisely identical younger twin of the individual whose genes are replicated.
As a onetime egg donor who has sometimes questioned the ethics of selling my genes, I appreciate the message of Peggy Orenstein's article that a family is a family, with all that entails, "regardless of whose genes are involved".
Identical twins, who have the same genes, were more similar in their attractiveness to mosquitoes than non-identical twins, whose genes are different.
He first studied the laboratory fruit fly, whose genes are much easier to manipulate, and showed three years ago that the fly could detect magnetic fields, but only when its cryptochrome gene was in good working order.
