Articles tagged with Asexual Reproduction
A new evolutionary theory proposes that asexual parasites can temporarily infect a wider range of hosts as harmful genetic mutations build up. This process, known as Ratchet-Driven Generalism, may make the parasite less specialized and more adaptable. However, it may also ultimately reduce fitness and increase extinction risk.
Researchers have discovered a brood pheromone released by clonal raider ant larvae that temporarily suppresses egg-laying in adult ants. The pheromone, MEHMP, is produced exclusively by larvae and helps synchronize brood care and reproduction in the colony.
A research team at the Walter and Eliza Hall Institute has discovered a genetic mechanism that allows certain parasites to infect multiple hosts, but at the cost of long-term survival. The study sheds light on how parasitic infections emerge and spread, with potential implications for public health surveillance and treatment strategies.
Researchers found that all Balanophora plants have an extremely reduced plastid genome, showing that even though they abandon photosynthesis, the plastid is still vital to their metabolism. Asexual reproduction likely evolved repeatedly in the group, with some species colonizing islands without fertilization.
The peach blossom jellyfish, an invasive species from China, has been spotted in 34 locations in B.C., with predictions suggesting sightings and locations will increase by the end of the decade. The jellyfish clones are effectively identical, having originated from the same polyp or cluster of polyps.
A WVU biologist is studying how genes establish animal body plans and contribute to regenerative abilities. He has identified Hox genes as key players in planarian regeneration, suggesting their functions may differ in highly regenerative versus poorly regenerative organisms.
Researchers at the University of Zurich have discovered a signal that activates the female gamete in thale cress, a model plant species. This breakthrough could lead to the development of apomixis, a form of asexual reproduction that would allow crop plants to be propagated more easily and efficiently.
Researchers at Tohoku University discovered that the KAI2-ligand hormone initiates and terminates asexual reproduction in liverwort plants based on environmental factors. The team found that gemma formation starts from the inner region of the gemma cup and moves out to the periphery.
Researchers at University College London discovered that worm mothers secrete a milk-like fluid to support their offspring's growth. This unique selfless act helps explain mysteries about the biology of ageing in nematode worms, which could have far-reaching implications for understanding human ageing.
Scientists prove Meselson effect in ancient asexual species, showing survival without sexual reproduction is possible. The study of beetle mite Oppiella nova reveals genetic variance and adaptation through independent genome evolution.
A recent study in Nature Communications found evidence of recombination and genetic exchange in bdelloid rotifers, which were previously thought to be asexual. The discovery suggests that these organisms may not be as evolutionarily dead-end as once believed.
In a recent study on snail reproduction, researchers found that asexual females can outcompete sexual females due to the two-fold cost of males, supporting John Maynard Smith's theory. This suggests sex is indeed a costly reproductive strategy in nature.
A new theory suggests that sexual reproduction evolved as a way to resist disease-causing microbes and adapt to constantly changing environments. Researchers used computer simulations to demonstrate the benefits of sex in nematode worms co-evolving with a highly pathogenic bacterium, providing evidence for the Red Queen theory.
Researchers found that sexually reproducing species are healthier and less likely to accumulate deleterious mutations over time. The study used the evening primrose plant as a model, comparing 30 pairs of species with different reproductive methods, revealing strong support for the theory that sex is beneficial for health in plants.
A recent study published in the journal Evolution proposes that sex may not promote genetic diversity as previously thought. Instead, its primary function is to maintain a species' genome context and prevent macroevolution, allowing for microevolution to occur.
A study by University of Toronto researchers found that species in spatially heterogeneous environments have higher rates of sexual reproduction. Sexual reproduction resulted in organisms with better adaptability and robust genetic constitutions.
Researchers found female termite primary queens can produce both sexually and asexually reproducing babies, mostly growing into queen successors with no inbreeding risk. Asexual reproduction allows colonies to grow faster while maintaining genetic diversity.
Researchers identify four copies of a target gene on separate chromosomes, eliminating possibility of sexual reproduction. This confirms that the ancient microbe has evolved without sex for tens of millions of years.
A recent study by UC Santa Barbara scientists found that sexual reproduction outperforms asexual reproduction in terms of progressive evolution and genetic diversity. This is because sexual reproduction allows for greater genetic variation and mixing, which accelerates the accumulation of beneficial mutations.