(PhysOrg.com) -- New research suggests that grandparents naturally and subconsciously favor the grandchildren who are most closely related to them genetically. The phenomenon is called "sexually antagonistic grandparental ...
(PhysOrg.com) -- David Page, director of the Whitehead Institute and professor of biology at Massachusetts Institute of Technology, says research indicates the much-maligned Y chromosome plays a more critical role in genetics ...
Biotechnology
Apr 20, 2010
0
0
(PhysOrg.com) -- Expectant human parents might wish for a boy or girl, but Hessian flies actually have a third option, and, no matter what, the flies are never surprised by the sex of their offspring.
Biotechnology
Mar 30, 2010
0
0
(PhysOrg.com) -- It is widely believed that women live long post-reproductive lives to help care for their grandchildren. According to the "Grandmother Hypothesis," post-menopausal women can increase their genetic contribution ...
Evolution
Oct 29, 2009
3
1
Cornell researchers have discovered a genetic mechanism in fruit flies that prevents two closely related species from reproducing, a finding that offers clues to how species evolve.
Biotechnology
Oct 26, 2009
3
0
University of Maryland biologists have genetically mapped the sex chromosomes of several species of cichlid (pronounced "sick-lid") fish from Lake Malawi, East Africa, and identified a mechanism by which new sex chromosomes ...
Plants & Animals
Oct 1, 2009
0
0
As we approache the 25th anniversary of the discovery of DNA fingerprinting (September 10), University of Leicester geneticists interested in a particular type of DNA are receiving some help from an unusual band of assistants.
Biotechnology
Sep 7, 2009
0
0
Early in development, mammalian female cells counteract their double dose of X chromosomes by coating one of them with a large RNA named XIST. The RNA binds to the same X chromosome from which it is transcribed and initiates ...
Cell & Microbiology
Aug 24, 2009
0
0
Scientists have long suspected that the sex chromosome that only males carry is deteriorating and could disappear entirely within a few million years, but until now, no one has understood the evolutionary processes that control ...
Evolution
Jul 17, 2009
11
0
Whether baby lizards will turn out to be male or female is a more complicated question than scientists would have ever guessed, according to a new report published online on June 4th in Current Biology. The study shows that ...
Plants & Animals
Jun 4, 2009
0
0
