Estimating dispersal and gene flow in the neotropical freshwater turtle Hydromedusa maximiliani (Chelidae) by combining ecological and genetic methods
Hydromedusa maximiliani is a vulnerable neotropical freshwater turtle endemic to mountainous regions of the Atlantic rainforest in southeastern Brazil.

Genetics of Resistance to Soybean Cyst Nematode, Heterodera glycines Ichinohe (RACE 3), in a Brazilian Soybean Population
A study was made of the genetics of resistance to the soybean cyst nematode, race 3, in a population derived from crosses between the Brazilian soybean genotypes BR 90-4722 and FT-Cristalina.

Genetics, drugs and environmental factors in parkinson's disease (A case-control study)
A case-control study of Parkinson's disease (PD) was conducted in the city of Rio de Janeiro based on the assumption that neurotoxins with secondary parkinsonian action may be related to the development of Parkinson's disease.

Genetic Adaptations Key To Extreme Microbe's Survival In Challenging Environment
The genome of a marine bacterium living 2,500 meters below the ocean's surface is providing clues to how life adapts in extreme thermal and chemical gradients

'Sex' Helps Bacteria Cope With A Changing World
Bacteria feel pressures to evolve antibiotic resistance and other new abilities in response to a changing environment, and they react by 'stealing' genetic information from other better-adapted types of bacteria

When Evolution Is Not So Slow And Gradual
Guppy populations introduced into new habitats developed new and advantageous traits in just a few years.

Adaptation To Parasites Drive African Fishes Along Different Evolutionary Paths
Scientists have discovered that a pair of closely related species of East African cichlid fishes evolved divergent immune gene adaptations which might explain why they do not interbreed, despite living side by side.

Removal Of Dominant Rivals Causes Male Cichlid Fish To Undergo Remarkable Transformation
Scientists have made some surprising observations about how those animals respond to changes in their environments known as "social opportunities."

Fragile X Syndrome: A Stimulating Environment Restores Neuronal Function In Mice
A new study of the malfunctioning neuronal machinery of Fragile X syndrome reveals that it can be restored by a stimulating environment.

Does Environment Influence Genes? Researcher Gives Hard Thoughts On Soft Inheritance
Organisms all inherit DNA from generation to generation, what biologists call hard inheritance, because the nucleotide sequence of DNA is constant and only changes by rare random mutation as it is passed down the generations.

Evidence of same-sex mating in nature: the story of Cryptococcus neoformans
Cryptococcus neoformans is a major cause of fungal meningitis in predominantly immunocomprised individuals.

The precise role of seminal proteins in sustaining post-mating responses in fruit flies
Successful reproduction is critical to pass genes to the next generation.

Frozen hair holds secrets of Yellowstone grizzlies
Locks of hair from more than 400 grizzly bears are stored at Montana State University, waiting to tell the tale of genetic diversity in the Yellowstone Ecosystem.

Population genetics of the Chilean frog Batrachyla leptopus (leptodactylidae)
Electrophoretic variation of proteins encoded by 14 loci was analyzed in eight (five continental and three insular) populations of the Chilean leptodactylid frog Batrachyla leptopus.

Genetics of resistance to powdery mildew (Microsphaera diffusa) in Brazilian soybean populations
Crosses between resistant and susceptible soybean cultivars were performed and the F2 populations were obtained to study the inheritance of soybean resistance to powdery mildew

The genetics and conservation of Araucaria angustifolia: I. Genetic structure and diversity of natural populations by means of non-adaptive variation in the state of Santa Catarina, Brazil
The objective of this study was to generate information relative to the allele distribution and dynamics within and among populations of Araucaria angustifolia, a naturally-occurring conifer in the south of Brazil

New discovery: Molecular variation in one gene affects the growth of natural populations
For the first time, ecologists have been able to show that molecular variation in one gene may affect the growth of a population in its natural habitat.

Study links ADHD cognitive and behavioral problems to genetic and environmental interactions
A new study indicates that cognitive and behavioral problems that underlie attention deficit hyperactivity disorder, or ADHD, are due to a complex interplay of genes and the environment.

Why some aphids can't stand the heat
For pea aphids, the ability to go forth and multiply can depend on a single gene, according to new research.

Fruit Fly Aggression Studies Have Relevance to Animal, Human Populations
Even the tiny, mild-mannered fruit fly can be a little mean sometimes - especially when there's a choice bit of rotten fruit to fight over.