In many animal species, the chromosomes differ between the sexes. The male has a Y chromosome. In some animals, however, for example birds, it is the other way round. In birds, the females have their own sex chromosome, the ...
Biotechnology
Jun 4, 2015
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(Phys.org) —A trio of researchers, two with the University of Hamburg in Germany and a third with Macquarie University in Australia has discovered that male St. Andrew's Cross spiders sniff the webs of female spiders to ...
(Phys.org) —North Carolina State University researchers studying aquatic organisms called Daphnia have found that exposure to a chemical pesticide has impacts that span multiple generations – causing the so-called "water ...
Ecology
Apr 22, 2013
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It's been more than fifty years since scientists discovered that the single-celled organism Tetrahymena thermophila has seven sexes. But in all that time, they've never known how each cell's sex, or "mating type," is determined; ...
Cell & Microbiology
Mar 26, 2013
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Sexually naïve male mice respond differently to the chemical signals emitted by newborn pups than males that have mated and lived with pregnant females, according to a study published March 20 in The Journal of Neuroscience. ...
Plants & Animals
Mar 19, 2013
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Young virgin female hide beetles (Dermestes maculatus) are attracted to cadavers by a combination of cadaver odour and male sex pheromones, finds a new study published in BioMed Central's open access journal Frontiers in ...
Plants & Animals
Aug 13, 2012
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Previously, Daiqin Li and colleagues at the National University of Singapore found that the male orb web spider loses its sex organ, called a palp, due to it breaking off during sex because it allowed the male to continue ...
(PhysOrg.com) -- Researchers have known for some time that the male sex organ, called a palp, in orb-web spiders is often broken off during copulation with females; what hasn’t been so clear is why. Now, new research ...
(PhysOrg.com) -- Female seed beetles are known for their promiscuity, a surprising fact given that the males of the species have dangerously sharp spikes on their sex organs. Now a U of T Mississauga team led by an undergraduate ...
Plants & Animals
Mar 5, 2009
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The deletion of the Wt1 gene during the early stages of the embryonic reproductive organ formation leads to differences in sex development in adult mice, according to an article published in the journal PLOS Genetics and ...
Cell & Microbiology
Jun 22, 2022
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