Though many scientists hailed the results last week, some geneticists expressed doubt about a study that linked several genes to extreme old age. Now, at least one expert is saying the DNA analysis chips used to conduct the study may have led to faulty results.
The study authors defend their work, but said in a statement Wednesday afternoon that they were re-examining their analysis.
A global hunt for genetic variations reveals secrets to disease and survival
By Gregory MonePosted 09.01.2005 at 2:00 am 1 Comment
The ability to spoon down ice cream or chug a milkshake might not seem like an evolutionary advantage in our weight-conscious society. But scientists say that 5,000 to 10,000 years ago, around the time dairy farming began in Northern Europe, natural selection encouraged the spread of a genetic mutation that enabled adults to digest the sugars in milk. Those with the new gene-lactase-had a nutritional advantage over those who lacked it, so they proliferated, along with the mutation.