Word: markers
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...children are asked to draw pictures of themselves. Each selects a Magic Marker. Michael chooses black. He draws a small circle at the top of the paper, then, unsatisfied, flips the sheet over and begins to draw a small stick figure. The two young women suggest that the children lay their heads directly on the paper; Betsy will draw an outline of their heads, and the children may fill in the features. Carmen and Elena respond at once and begin to work. Ralphy balks and starts to play elsewhere. He is taken out of the room by Lori...
...relies on enzymes that slice DNA in distinctive patterns; families with a history of a genetic disease will tend to have similar configurations, permitting scientists to zero in on the likeliest site of the offending gene. In recent weeks biologists have announced the discovery of RFLP distinctive patterns, or "markers," for cystic fibrosis, which afflicts about 30,000 Americans; cardiovascular disease susceptibility; polycystic kidney disease; and muscular dystrophy. Says Manuel Buchwald of the Hospital for Sick Children in Toronto, one of the co-discovers of the cystic fibrosis marker, "It's the first handle we have on the disease...
...latest batch of DNA markers will serve as important stepping-stones to the isolation of genes. But RFLPs can only approximate the gene's position; biologists must progressively snip away the intervening fragments before they can fish out the gene and begin manipulating it. At least one marker, however, may be immediately useful. John Baxter of California Biotechnology, the firm where the heart-disease markers were found, believes the RFLP could help in alerting people to their tendency in time to change their behavior. Warns Baxter: "If you have this marker, it's equivalent to having blood pressure...
...Caravaggio," the Metropolitan Museum of Art's big show this winter, may come to be remembered as a marker in the history of exhibitions. Not even the Met, this time, could get the loan of his greatest work. Owners and curators are getting more conservative, especially in Italy, and the days when uniquely important works of art could be flown around the world like greeting cards, even for scholarly purposes, are fading...
...black marker protruding a couple feet out of the ice near the Boston side of the river might have been what the student saw, according to Murray...