(PhysOrg.com) -- Sexually reproducing species need at least two sexes in order to produce offspring, but there are many ways that nature produces different sexes. Many animals (including humans and other mammals) use a chromosomal ...
Plants & Animals
Dec 6, 2011
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(PhysOrg.com) -- New research from The Australian National University has shown how genetic variation persists through generations, rather than being bred out in an evolution towards a ‘perfect type’.
Plants & Animals
Nov 22, 2011
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Researchers at the Keck School of Medicine of the University of Southern California (USC) have discovered key processes by which estrogen, the female sex hormone, activates genes in breast-cancer cells. Greater understanding ...
Biochemistry
Nov 15, 2011
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Max Planck researchers analyze the two chromosome sets in the human genome separately for the first time.
Biotechnology
Sep 12, 2011
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There are many old wives' tales about what determines a baby's sex, yet it is the tight controls at the gene level that determine an organism's sex in most species. Researchers at Michigan State University have found that ...
Evolution
Sep 12, 2011
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B chromosomes have a functional effect on sex determination in a species of cichlid fishes from Lake Victoria, according to a study by Japanese researchers to be published in open-access journal PLoS Genetics on August 18th, ...
Biotechnology
Aug 18, 2011
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Biology textbooks maintain that the main function of sex is to promote genetic diversity. But Henry Heng, Ph.D., associate professor in WSU's Center for Molecular Medicine and Genetics, says that's not the case.
Evolution
Jul 7, 2011
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(PhysOrg.com) -- The brains of all vertebrates display gender-related differences. In songbirds, for example, the size of the brain areas that control their singing behaviour could be linked to the size of their song repertoires. ...
Plants & Animals
Jun 13, 2011
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(PhysOrg.com) -- Researchers at Imperial College London have uncovered an inherent difference in the way the genes of males or females can be "switched off" or silenced in the body's developing immune system. This finding ...
Cell & Microbiology
Sep 16, 2010
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(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
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