All Articles Tagged As: gender
Fungi do not have sexes, just so-called mating types. A new study being published today in the prestigious journal PLoS shows that there are great similarities between the parts of DNA that determine the sex of plants and animals and the parts of DNA that determine mating types in certain fungi. This makes fungi interesting as new model organisms in studies of the evolutionary development of sex chromosomes.
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 | Fungi don't exactly come in boy and girl varieties, but they do have sex differences. In fact, a new finding from Duke University Medical Center shows that some of the earliest evolved forms of fungus contain clues to how the sexes evolved in higher animals, including that distant cousin of fungus, the human. ...> Full Article |
One of the major components of the world's biological diversity are the differences between males and females in traits related to mating, including weapons used when competing for mates and display traits used to seduce them. Such gender differences are thought to arise because selection acts differently on each sex. The conflicting interests of males and females in reproduction are thought to be a key source of sex-specific selection on such traits.
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 | While the biological basis for homosexuality remains a mystery, a team of neurobiologists reports they may have closed in on an answer -- by a nose. ...> Full Article |
Sexy dads produce sexy sons, in the insect world at least. While scientists already knew that specific attractive traits, from cricket choruses to peacocks' tails, are passed on to their offspring, the heritability of attractiveness as a whole is more contentious. Now, new research by the University of Exeter, published in the journal Current Biology, shows that attractiveness is hereditary.
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 | Adding another layer of competition to the mating game, scientists are reporting possible biochemical proof that the reproductive system of female mammals can "sense" the presence of sperm and react to it by changing the uterine environment. This may be the molecular mechanism behind post-copulatory sexual selection, in which females that have mated with several partners play a role in determining which sperm fertilizes their egg. ...> Full Article |
The observation that males evolve more quickly than females has been around since 19th century biologist Charles Darwin noted the majesty of a peacock's tail feather in comparison with the plainness of the peahen's.
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The humble fruit fly has played a lead role on the scientific stage for more than a century. Tiny picnic pests to us, flies from a single species, Drosophila melanogaster, have provided a bounty of Nobel Prize-winning discoveries for researchers in the fields of genetics and developmental biology, and helped serve as models of human diseases such as Parkinson's and cancer.
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 | If you met a person who had 10 children, all of whom were girls, you would probably find this surprising. Yet this kind of distorted sex ratio does occur in groups as diverse as mammals, insects, and plants, where some parents consistently produce litters in which the sex ratio is dramatically skewed. ...> Full Article |
 | Biologists genetically manipulated nematode worms so the animals were attracted to worms of the same sex - part of a study that shows sexual orientation is wired in the creatures' brains. ...> Full Article |
Basic principles of biology rather than women's newfound economic independence can explain why fewer of them are getting married and having children, and why the trend may only be temporary.
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University of Adelaide researchers have discovered a way of creating a male mouse without a Y chromosome by manipulating a single gene in the developing foetus.
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 | Researchers at the University of Illinois at Chicago have discovered a chemical compound in male blue crabs that is not present in females -- the first time in any species that an entire enzyme system has been found to be activated in only one sex. ...> Full Article |
 | Genetic archaeology is providing a new clue to one of the greatest gender mysteries in the fish world: how did male pregnancy evolve in a family of fish? ...> Full Article |
Research has revealed a remarkable tale of fish changing sex and fish harems in waters off the New South Wales Central Coast.
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