Insect pheromones are odor molecules used for chemical communication within a species. Sex pheromones play a crucial role in the mating of many insects. Species-specific odors attract males and females of the same species. ...
Ecology
Apr 11, 2024
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2
Sex pheromones are vital in facilitating the chemical communication that underpins insect courtship and mating behavior. Among female American cockroaches (Periplaneta americana), two key volatile sex pheromone components, ...
Plants & Animals
Apr 5, 2024
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4
A study published in Social Psychological and Personality Science investigated the factors influencing orgasm rates for women across sexual orientations. The researchers report that partner gender plays a significant role ...
Social Sciences
Apr 4, 2024
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1
New research suggests animals can thrive in human-dominated environments by being expert judges of risk. Alexis Breen from the Max Planck Institute for Evolutionary Anthropology in Leipzig, and Dominik Deffner from the Max ...
Plants & Animals
Apr 2, 2024
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260
A new analysis of adolescent TV and films on Netflix suggests that too often, it shows misleading depictions of pain, portraying pain as something arising only through a violent act or injury. Instead of trivializing the ...
Social Sciences
Mar 28, 2024
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47
An increasing number of places of worship are offering same-sex weddings, a decade on from same-sex marriage in England and Wales becoming legal, a new study shows.
Social Sciences
Mar 28, 2024
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1
Researchers from the Max Planck Institute for Biology Tübingen have broken new ground by demonstrating that an HMG-box gene in brown algae is crucial for determining male sex. This breakthrough significantly expands our ...
Evolution
Mar 22, 2024
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16
A model developed by RIKEN researchers incorporates species that change sex during their life cycles for the first time, promising new insights into genes affecting the reproductive success of males and females differently. ...
Evolution
Mar 19, 2024
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13
A piece of rotting fruit is likely covered in hundreds if not thousands of microscopic roundworms, including C. elegans—a popular experimental model system for studying neurogenetics. With a lifespan of only a few weeks, ...
Ecology
Mar 11, 2024
0
33
New projections of population and human capital provide insights into what our future could look like all the way until the year 2100 under different developmental scenarios. The findings are presented in the datasets compiled ...
Social Sciences
Mar 8, 2024
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45
In biology, sex is a process of combining and mixing genetic traits, often resulting in the specialization of organisms into male and female types (or sexes). Sexual reproduction involves combining specialized cells (gametes) to form offspring that inherit traits from both parents. Gametes can be identical in form and function (known as isogametes), but in many cases an asymmetry has evolved such that two sex-specific types of gametes (heterogametes) exist: male gametes are small, motile, and optimized to transport their genetic information over a distance, while female gametes are large, non-motile and contain the nutrients necessary for the early development of the young organism.
An organism's sex is defined by the gametes it produces: males produce male gametes (spermatozoa, or sperm) while females produce female gametes (ova, or egg cells); individual organisms which produce both male and female gametes are termed hermaphroditic. Frequently, physical differences are associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience.
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