单选题 3. A Gay Biologist
Molecular (分子的) biologist Dean Hammer has blue eyes ,light brown hair and a good sense of humor. He smokes cigarettes, spends long hours in an old laboratory at the US National Institute of Health. He also happens to be openly, matter - of - factly gay.
What is it that makes Hammer who he is? What accounts for the talents and traits that make up anyone's personality? Hammer is not content merely to ask such questions; he is trying to answer them as well. A pioneer in the field of molecular psychology, Hammer is exploring the role genes play in governing the very core of our individuality. To a remarkable extent, his work on what might be called the gay, thrill--seeking and quit--smoking genes reflects how own genetic predispositions(倾向).
That work, which has appeared mostly in scientific journals, has been gathered into an accessible and quite readable form in Hammer' s creative new book, Living with Our Genes. "vou have about as much choice in some aspect of your personality. "Hamer and co - author Peter Copeland write in the introductory chapter, "as you do in the shape of your nose or the size of your feet. "
Until recently, research into behavioral genetics was dominated by psychiatrists and psychologists, who based their most conclusions about the importance of genes on studies of identical twins. For example, psychologist Michael Bailey of Northwestern University famously demonstrated that if one identical twin is gay, there is about a 50% likelihood that the other will be too. Seven years ago. Hamer picked up where the twin studies left off, homing in on (目标追踪) specific strips of DNA that appear to influence everything from mood to sexual orientation.
Hamer switched to behavioral genetics from basic research, "after receiving his doctorate from Harvard, he spent more than a decade studying the biochemistry of a protein that cells use to metabolize (使新陈代谢) heavy metals like copper and zinc. As he was about to turn 40, however, Hamer Suddenly realized he had learned as much about the protein as he cared to. "Frankly, I was bored, "he remembers, "and ready for something new. /

单选题 Dean Hammer is a molecular biologist, a smoker and a gay at the same time.

单选题 Hammer' s study is about what accounts for the talents and traits that make up one' s personality.

单选题 Hammer publish most of his work in his new book Living with Our Genes.

单选题 Homosexual behaviors seem ripe for exploration because few scientists had dared tackle such an emotionally and politically charged subject.

单选题 Research on behavioral genetics used to be and will be dominated by psychiatrists and psychologists.

单选题 If one identical twin is gay ,there is about a 100% likelihood that the other will be too.

单选题 After spending more than a decade studying the biochemistry of a protein, Hamer suddenly realized he need to do something new.