The highly unusual "semi-identical" Australian twins reported last week are the result of a rare event. It's thought the brother and sister (who have identical genes from their mother but not their father) developed from ...
Plants & Animals
Mar 11, 2019
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10
Many organisms including insects, amphibians and yeasts use sex pheromones for attracting individuals of the opposite sex, but what happens to sex pheromones as new species emerge? New research publishing January 22 in the ...
Cell & Microbiology
Jan 22, 2019
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66
Most evolutionary biologists distinguish one species from another based on reproductivity: members of different species either won't or can't mate with one another, or, if they do, the resulting offspring are often sterile, ...
Plants & Animals
Jan 3, 2019
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11
For nearly 100 years, biologists have argued about how exactly natural selection can possibly work. If nature selects the individuals with the best genes, then why aren't all organisms the same? What maintains the genetic ...
Evolution
Dec 13, 2018
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73
Genes that act late in life could explain why women have poorer health than men in older age, according to new research.
Evolution
Nov 28, 2018
4
370
By the end of every spring semester, students in my introductory biology course at Vanderbilt University have become quite familiar with natural variation in human sex chromosomes. They know, for example, that most females ...
Plants & Animals
Oct 30, 2018
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4
Up to now, researchers have believed that birds stay at home and altruistically help raise younger siblings because this is the only way to pass on genes when you cannot breed yourself. But this idea is only partially true. ...
Plants & Animals
Sep 10, 2018
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2
Male mice grow ovaries instead of testes if they are missing a small region of DNA that doesn't contain any genes, finds a new paper published in Science.
Biotechnology
Jun 14, 2018
1
786
A new study has cast doubt on leading theory for how tiny creatures have evolved for tens of millions of years—without ever having sex.
Evolution
Apr 25, 2018
4
57
Two new studies by Osaka University researchers provide insights on why male and female bodies of the same species differ. The studies show factors that regulate the expression of doublesex1, a gene responsible for the growth ...
Plants & Animals
Nov 8, 2017
0
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