News tagged with male genitalia
Genital stimulation opens door for cryptic female choice in tsetse flies
May 14, 2009 |
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Manipulation of male and/or female genitalia results in a suite of changes in female reproductive behavior in tsetse flies, carriers of African sleeping sickness.
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Hidden genitalia in female water striders makes males 'sing'
Jun 11, 2009 |
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In a study published in PLoS ONE June 10, Chang Seok Han and Piotr Jablonski at Seoul National University, Korea, report that by evolving a morphological shield to protect their genitalia from males' forceful copulatory attemp ...
Female choice benefits mothers more than offspring
Oct 22, 2009 |
3.7 / 5 (3) |
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The great diversity of male sexual traits, ranging from peacock's elaborate train to formidable genitalia of male seed beetles, is the result of female choice. But why do females choose among males? In a new study published ...
How 'secondary' sex characters can drive the origin of species
Biology /
Aug 25, 2008 |
4.4 / 5 (5) |
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The ostentatious, sometimes bizarre qualities that improve a creature's chances of finding a mate may also drive the reproductive separation of populations and the evolution of new species, say two Indiana University Bloomington ...
Size matters... if you're a rodent
Biology /
Feb 28, 2007 |
3.6 / 5 (7) |
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Promiscuity is common among female rodents, leading to competition between the sperm of rival males over who fertilizes the eggs. It now seems that possessing a longer penis may give males an advantage in this competition, ...
'War Between the Sexes:' The Co-evolution of Genitalia in Waterfowl
Biology /
May 01, 2007 |
4.1 / 5 (11) |
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A team of biologists at Yale University and the University of Sheffield discovered anatomical details about the female reproductive tract in waterfowl that indicate that male and female anatomy have co-evolved in a “sexual ...
How does one sex grow larger than the other?
Biology /
Jan 29, 2007 |
3.7 / 5 (11) |
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Why are males larger than females in some animal species (such as most mammals), females larger than males in others (such as most insects), and why are the sexes alike in yet other species (such as several ...
Researchers find an evolutionarily preserved signature in the primate brain
Jun 20, 2008 |
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Researchers have determined that there are hundreds of biological differences between the sexes when it comes to gene expression in the cerebral cortex of humans and other primates. These findings, published June 20th in ...
Researchers find an evolutionarily preserved signature in the primate brain
Jun 20, 2008 |
4.3 / 5 (3) |
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Researchers from Uppsala University, Karolinska Institute, and the University of Chicago, have determined that there are hundreds of biological differences between the sexes when it comes to gene expression in the cerebral ...
Certain female fish have special mating preference
May 15, 2005 |
5 / 5 (1) |
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Ladies' choice A biologist at Washington University in St. Louis has shown that for some fish species, females prefer males with larger sexual organs, and actually choose them for mating. That does not exclude ...
Sex is thirst-quenching for female beetles
Biology /
Aug 28, 2007 |
4 / 5 (6) |
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Female beetles mate to quench their thirst according to new research by a University of Exeter biologist. The males of some insect species, including certain types of beetles, moths and crickets, produce unusually large ejaculates, ...
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