Word: traits
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...healthy survivors may lead a genetically charmed life. Each of the body's cells possesses an identical inherited molecular trait, dubbed its HLA type, that allows an individual to distinguish friend from microscopic foe. Some people's HLA types are more common than others. Heredity specialists have already identified a few genetic types that appear to increase a person's chance of developing AIDS after infection. Now they are trying to determine if long-term survivors hold any inherited molecular configurations in common that could be responsible for their ability to resist...
...antibody which recognizes pollen, as well as other common allergens, is a protein called IgE. People with allergies, a genetic trait, have elevated levels of this protein and therefore respond much more quickly and violently to the rather harmless pollen grain...
Pedigree analysis, or studying whether traits run in a family, is commonly used to test whether or not a trait is genetic...
Dean H. Hamer, chief of a National Institutes of Health section on Gene Structure and Regulation, said there were three methods by which to study biological causes of a trait: analysis of trends in families, examination of "candidate" genes and linkage analysis...
Well, love either is or is not intrinsic to our species; having it both ways leads nowhere. And the contention that romance is an entirely acquired trait -- overly imaginative troubadours' revenge on muddled literalists -- has always rested on some teetery premises...