A UT Arlington research team says their study of genetic information from more than 4,000 beetle species has yielded a new theory about why some species lose their Y chromosome and others, such as humans, hang on to it.
Biotechnology
Jun 17, 2014
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(Phys.org) —Virginia Tech entomologists have developed a chromosome map for about half of the genome of the mosquito Aedes agypti, the major carrier of dengue fever and yellow fever.
Cell & Microbiology
Jun 17, 2014
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In many species, the possession of X and Y chromosomes determines whether an individual develops into a male or female. In humans, for example, individuals who inherit their father's Y chromosome become male (XY), and individuals ...
Evolution
May 13, 2014
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A Ludwig Cancer Research study has uncovered a phenomenon that alters prevailing views of how the genome is expressed to make and sustain the life of mammals. Published in the journal Science, the paper helps explain why ...
Biotechnology
Jan 9, 2014
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Scientists historically have argued that evolution proceeds through gradual development of traits. But how can incremental changes apply to the binary switch between two sexes, male or female? Researchers at Case Western ...
Evolution
Jul 29, 2013
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X chromosomes are very special genetic material. They differ in number between men and women. To achieve equality between sexes, one out of two X chromosomes in women is silenced. In flies, the opposite happens: in male flies, ...
Cell & Microbiology
Jul 25, 2013
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(Phys.org) -- The propagation of every animal on the planet is the result of sexual activity between males and females of a given species. But how did things get this way? Why two sexes instead of one? Why are sperm necessary ...
Biotechnology
Aug 9, 2012
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Two new studies offer insight into sex chromosome evolution by focusing on papaya, a multimillion dollar crop plant with a sexual problem (as far as growers are concerned) and a complicated past. The findings are described ...
Biotechnology
Aug 6, 2012
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Fears that sex-linked chromosomes, such as the male Y chromosome, are doomed to extinction have been refuted in a new genetic study which examines the sex chromosomes of chickens.
Biotechnology
May 8, 2012
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By mating with nearly 100 males, queen bees on isolated islands avoid inbreeding and keep colonies healthy.
Plants & Animals
Apr 16, 2012
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