(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
Scientists have known that sex-determination in vertebrates happens in the germ cells, a body's reproductive cells, and the somatic cells, the cells that are not reproductive cells. Yet they have not fully understood the ...
Plants & Animals
Sep 9, 2022
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72
Higher water temperatures induce specific chemical tags at targeted locations on the DNA of embryonic zebrafish. These "epigenetic" changes can then reroute genetic pathways, so that the embryos change sex. This finding, ...
Plants & Animals
Jul 20, 2022
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141
The sex and sexual characteristics constitute key aspects of an organism's life and are determined by a biological process known as sex determination. These ever-evolving mechanisms are broadly classified based on the type ...
Cell & Microbiology
Jun 21, 2022
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22
Sex is a complicated affair for Australia's Jacky Dragon lizard.
Plants & Animals
Feb 9, 2021
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70
The evolution of sex chromosomes is of crucial importance in biology as it stabilizes the mechanism underlying sex determination and usually results in an equal sex ratio. An international team of scientists, led by researchers ...
Biotechnology
Sep 8, 2020
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166
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
2
481
Sex in plants can be befuddling. Most species are hermaphrodites, expressing both male and female gametes in one individual. But some, including shrub willow Salix purpurea, employ the evolutionary strategy we are far more ...
Biotechnology
Apr 20, 2020
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84
In the steamy, often filthy world of the humble house fly, (the Musca domestica) clear division exists among the males of the species. Though not a civil war, there are differences, to be sure, between males in the north ...
Molecular & Computational biology
Sep 5, 2019
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70
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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