Genetic speciation is the biological process by which reproductive isolation between populations evolves primarily through genetic divergence, leading to the formation of distinct species. It involves the accumulation of heritable genetic differences via mutation, recombination, genetic drift, and natural or sexual selection, which alter allele frequencies and genomic architecture. These changes can generate prezygotic or postzygotic barriers, such as behavioral incompatibilities, hybrid sterility, or reduced hybrid viability. Genetic speciation may occur in various geographic contexts (allopatric, sympatric, parapatric) and is often associated with genomic features like chromosomal rearrangements, divergence in gene regulatory networks, and the fixation of Dobzhansky–Muller incompatibilities.
In southern Africa, a group of people lived in partial isolation for hundreds of thousands of years. This is shown in a new study based on analyses of the genomes of 28 people who lived between 10,200 and 150 years ago in ...
Evolution
Dec 3, 2025
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335
When males are forced to compete for females, new species form more rapidly. This has been shown in a new study where the researchers compared beetles allowed to mate freely with groups of the same species where competition ...
Plants & Animals
Dec 1, 2025
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30
A tiny freshwater snail from New Zealand is giving scientists a glimpse into evolution in motion. University of Iowa biologists have traced the snail's evolutionary history through its genome and discovered that the species ...
Evolution
Nov 12, 2025
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European cuckoos lay very different eggs depending on the host species. Genetic analyses have revealed how this adaptation is inherited without leading to speciation.
Evolution
Oct 31, 2025
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105
Genomic research has found the endangered hoiho is made up of three distinct subspecies, a discovery that may help guard against a fatal disease.
Plants & Animals
Oct 28, 2025
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34
Phytochelatin synthases (PCSs) produce phytochelatins—tiny, cysteine-rich peptides that bind and neutralize toxic metal ions such as cadmium and arsenic. These molecules act as the plant's natural detox system, sequestering ...
Evolution
Oct 18, 2025
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174
A simple change in species composition can impact the course of evolution: A research team from the University of Bern and the University of British Columbia in Canada shows that the presence of just one other fish species ...
Evolution
Oct 15, 2025
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35
Over a few million years, the spider Dysdera tilosensis—a species endemic to the Canary Islands—has reduced the size of its genome by half during the process of colonization and adaptation to its natural habitat. In addition ...
Evolution
Oct 13, 2025
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341
After humans started using the Baltic Sea, its diatom populations started to experience accelerated—and, so far, irreversible—changes in genetic composition and diversity, according a recent study led by researchers in Konstanz.
Ecology
Sep 26, 2025
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46
In about one out of every 800 people, two chromosomes fuse together to form an unusual bond. These are known as Robertsonian chromosomes. It's a mystery that has long stumped scientists.
Evolution
Sep 24, 2025
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200
