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.
A new University of Utah-led study has discovered the mechanism behind a decades-old evolutionary mystery—how "selfish chromosomes" cheat the rules of genetic inheritance. The researchers found that rogue chromosomes hijack ...
Evolution
Mar 12, 2026
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182
A new study reveals that behavioral isolation between populations of Bahamas mosquitofish is driven primarily by the actions of females—not just through mating choice behaviors, but also through sometimes violent resistance. ...
Evolution
Mar 11, 2026
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12
A research team led by scientists at the Butantan Institute in São Paulo, Brazil, has completed the most extensive genetic sequencing of a jararaca viper to date. The focus of the study was the genome of the golden lancehead ...
Evolution
Mar 11, 2026
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40
Herring from different parts of the Baltic Sea belong to distinct populations genetically adapted to local differences in salinity and temperature. However, these populations can also mix with each other, according to a new ...
Ecology
Mar 9, 2026
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16
When closely related species mate, their offspring sometimes survive but cannot reproduce. This pattern often affects males first, with hybrid males frequently failing to produce functional sperm even when hybrid females ...
Evolution
Mar 9, 2026
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1273
Animals of the same species don't always look the same. From birds with different beak shapes to mammals that vary in size or color, populations living in different places can often look very different.
Evolution
Mar 1, 2026
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1582
There may be twice as many vertebrates on the planet as previous estimates claimed, according to a new study published in the journal Proceedings of the Royal Society B: Biological Sciences. That's not because of any errors ...
In the plant world, when two different species mate, their offspring often don't survive. The reason lies in their DNA: incompatible genes often mix in their offspring, triggering a fatal breakdown known as hybrid lethality ...
Molecular & Computational biology
Feb 4, 2026
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45
The species Orcinus orca, generally known as orcas or killer whales, is made up of many genetically distinct populations called ecotypes. Each ecotype indicates an ecological specialization with its own ecological and phylogenetic ...
Plants & Animals
Dec 29, 2025
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155
Matías Gómez-Corrales, a recent biological sciences Ph.D. graduate from the University of Rhode Island, and his advisor, Associate Professor Carlos Prada, have published a paper in Nature Communications, revealing key mechanisms ...
Evolution
Dec 23, 2025
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