December 23, 1987 |
Geneticists have discovered a gene that determines the sex of a human embryo, a finding that offers an unprecedented window into the earliest stages of development. The gene appears to start a complex chain reaction of hormones that eventually leads to the development of a male. Without the gene, the embryo begins a different pathway and grows into a female. The gene is located on the Y chromosome, which is part of the inborn genetic code of men but not women.
December 14, 1989 |
Individuals infected with the AIDS virus have much higher concentrations of the virus in their circulation than previously thought, according to studies by researchers at Cedars-Sinai Medical Center in Los Angeles and the University of Washington in Seattle published in today's issue of the New England Journal of Medicine.
CALIFORNIA | LOCAL
February 12, 1990 |
On the corner of Dr. David Page's desk rests a foot-high stack of newly published genetics textbooks. They matter-of-factly describe the location of the sex-determining factor, the single gene that settles the question of whether a fertilized egg will be a boy or a girl. The gene was Page's discovery. Its rapid rise to the status of accepted wisdom is hardly a surprise, for when he revealed it at a news conference, the announcement was a major event in the world of genetics.
CALIFORNIA | LOCAL
July 29, 1999
Researchers have for the first time transformed human cells into tumors by genetic manipulation, a team from the Whitehead Institute for Biomedical Research in Boston reports in today's Nature. It has been relatively easy to convert rodent cells into tumors in the laboratory, but human cells have previously resisted such attempts. The team achieved their success by altering just three genes, demonstrating that production of cancer is controlled by a short, defined genetic process.
February 15, 1992
Edwin C. Whitehead, 72, a philanthropist and developer of scientific equipment who with his father founded Technicon Corp. in 1939. The company created a more accurate and easier-to-read electrocardiograph, the first device to automate the reading of microscope slides and the first portable respirator. Whitehead sold Technicon to Revlon in 1980 for $400 million and established an investment firm.
September 3, 2005 |
The human Y chromosome -- the DNA chunk that makes a man a man -- has lost so many genes over time that some scientists have suspected it might disappear in 10 million years. But a new study says it'll stick around. Researchers found no sign of gene loss over the last 6 million years, suggesting the chromosome is "doing a pretty good job of maintaining itself," said researcher David Page of the Whitehead Institute for Biomedical Research in Cambridge, Mass.