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Soon after Harris's HeLa-chicken study, a pair of researchers at New York University discovered that human-mouse hybrids lost their human chromosomes over time, leaving only the mouse chromosomes. This allowed scientists to begin mapping human genes to specific chromosomes by tracking the order in which genetic traits vanished. If a chromosome disappeared and production of a certain enzyme stopped, researchers knew the gene for that enzyme ..
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hela
henrietta-lacks
human-genome
medical-research
genetics
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Rebecca Skloot |
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Lillian converted to Puerto Rican," Gladys said, holding the letter to her chest. I looked at Gary, who sat beside her. "Lillian's skin was real light, even lighter than mom's," Gary explained. "She married a Puerto Rican somewhere in New York. Since she could pass, she disowned her blackness--converted to Puerto Rican because she didn't want to be black no more."
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Rebecca Skloot |
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be4eb26
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Today an estimated 13 percent of birds are threatened, according to the International Union for Conservation of Nature. So are 25 percent of mammals and 41 percent of amphibians, in large part because of human activity. Hydropower and road construction imperil China's giant pandas. The northern bald ibis, once abundant in the Middle East, has been driven almost to extinction by hunting, habitat loss, and the difficulties of doing conservati..
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Rebecca Skloot |