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.
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
0
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
0
154
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
0
57
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
0
334
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
0
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
0
20
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
0
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
0
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
0
174
