There are many known sex differences in health and disease: cases in which either men or women are more likely to get a disease, experience a symptom, or have a certain drug side effect. Some of these sex differences are ...
Cell & Microbiology
Aug 7, 2024
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19
Researchers from Tokyo Metropolitan University have taken a big step in solving the mystery around why animals evolve sex chromosomes. It had long been proposed that sex chromosomes evolved to reduce "sexual conflict," the ...
Evolution
Aug 5, 2024
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30
UNSW Sydney researchers have made new discoveries of fundamental differences in biological processes between males and females—by interrogating the unique and diverse sex chromosome systems of the platypus and the chicken.
Plants & Animals
Jul 30, 2024
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24
"We discovered a pronounced 'men are from Mars, women are from Venus' pattern," says marine and environmental biologist Suzanne Edmands.
Cell & Microbiology
Jun 25, 2024
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39
New research led by the University of Bath's Milner Centre for Evolution shows that shorebird species where females breed with multiple males in each season evolve significantly faster than monogamous species. Their findings ...
Plants & Animals
Jun 12, 2024
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111
What establishes the male or female sex of an ant? In humans, it is X and Y chromosomes that assume this function: Women have two X chromosomes while men have one X and one Y chromosome. In ants, bees, and wasps, the factor ...
Plants & Animals
Jun 6, 2024
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1
Researchers from the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) and the National University of Singapore have identified a gene locus responsible for sex determination in the European green toad. This ...
Plants & Animals
Jun 6, 2024
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20
The single-cell parasite Cryptosporidium is a leading cause of deadly diarrheal disease in young children, and a recent outbreak in the United Kingdom highlights how vulnerable the water supply is to this pathogen.
Cell & Microbiology
May 30, 2024
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1
Newly generated, complete "end-to-end" reference genomes for the sex chromosomes of five great ape species and one lesser ape species—produced by an international collaborative team led by researchers at Penn State, the ...
Plants & Animals
May 29, 2024
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25
Researchers at the Francis Crick Institute, working with University of Oxford, University of York and Oxford Archaeology, have developed a new technique to measure the number of chromosomes in ancient genomes more precisely, ...
Archaeology
Jan 11, 2024
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340
A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most sexual organisms have two sexes. In many cases, sex determination is genetic: males and females have different alleles or even different genes that specify their sexual morphology. In animals, this is often accompanied by chromosomal differences. In other cases, sex is determined by environmental variables (such as temperature) or social variables (the size of an organism relative to other members of its population). The details of some sex-determination systems are not yet fully understood.
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