In many species, the possession of X and Y chromosomes determines whether an individual develops into a male or female. In humans, for example, individuals who inherit their father's Y chromosome become male (XY), and individuals ...
Evolution
May 13, 2014
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2
It turns out that the rigid "line in the sand" over which the human sex chromosomes—-the Y and X—- go to avoid crossing over is a bit blurrier than previously thought. Contrary to the current scientific consensus, Arizona ...
Biotechnology
Mar 23, 2016
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90
Yin and Yang, Venus and Mars, the Moon and the Sun, however you want to describe it, becoming a female or a male can make a big difference in your life, and not just for human beings. Dr. Misato O. Miyakawa, a former post-doc ...
Biotechnology
Nov 26, 2015
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5
A new method for estimating the biological sex of human remains based on reading protein sequences rather than DNA has been used to study an archeological site in Northern California. The protein-based technique gave superior ...
Archaeology
Jul 20, 2020
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481
In certain turtle species, the temperature of the egg determines whether the offspring is female or male. But now, new research shows that the embryos have some say in their own sexual destiny: they can move around inside ...
Plants & Animals
Aug 1, 2019
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2687
Some reptiles such as crocodilians and some turtles are known to display temperature-dependent sex determination (TSD), where the ambient temperature of the developing eggs determines the individual's sex. For example in ...
Plants & Animals
Dec 23, 2015
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40
Most people don't know this, but the cucumbers we buy in the supermarket are purely female - grown from plants which were carefully cross-bred to produce female-only flowers. But while farmers have long known that "femaleness" ...
Biotechnology
Nov 30, 2015
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20
Hotter temperatures are messing with the gender of Australia's bearded dragon lizards, a new study finds.
Ecology
Jul 2, 2015
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457
(PhysOrg.com) -- A new analysis of extinct sea creatures suggests that the transition from egg-laying to live-born young opened up evolutionary pathways that allowed these ancient species to adapt to and thrive in open oceans.
Evolution
Sep 16, 2009
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0
(PhysOrg.com) -- Sexually reproducing species need at least two sexes in order to produce offspring, but there are many ways that nature produces different sexes. Many animals (including humans and other mammals) use a chromosomal ...
Plants & Animals
Dec 6, 2011
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