(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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A comparison of Y chromosomes in eight African and eight European men dispels the common notion that the Y's genes are mostly unimportant and that the chromosome is destined to dwindle and disappear.
Biotechnology
Jan 9, 2014
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Biologically speaking, nearly every species on Earth has two opposite sexes, male and female. But with some fungi and other microbes, sex can be a lot more complicated. Some members of Cryptococcus, a family of fungus linked ...
Biotechnology
Aug 11, 2017
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129
Scientists historically have argued that evolution proceeds through gradual development of traits. But how can incremental changes apply to the binary switch between two sexes, male or female? Researchers at Case Western ...
Evolution
Jul 29, 2013
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Researchers from Tokyo Metropolitan University have identified unifying features in the early evolution of X and Y chromosomes. Newly evolved sex chromosomes in three fruit fly species showed the same genetic compensation ...
Evolution
Nov 15, 2021
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193
(PhysOrg.com) -- Expectant human parents might wish for a boy or girl, but Hessian flies actually have a third option, and, no matter what, the flies are never surprised by the sex of their offspring.
Biotechnology
Mar 30, 2010
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A modification that creates more male offspring was able to eliminate populations of malaria mosquitoes in lab experiments.
Plants & Animals
May 12, 2020
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436
When it comes to sex, frogs, just like in people, exhibit a similar XX (female) and XY (male) sex chromosome pattern of inheritance.
Evolution
Jan 30, 2018
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135
University of Maryland biologists have genetically mapped the sex chromosomes of several species of cichlid (pronounced "sick-lid") fish from Lake Malawi, East Africa, and identified a mechanism by which new sex chromosomes ...
Plants & Animals
Oct 1, 2009
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Inbreeding can unexpectedly extend male lifespan. Insect experiments described in the open access journal BMC Evolutionary Biology have shown that, in seed beetles, inbreeding causes males to live longer, while shortening ...
Feb 6, 2009
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