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bacteria and DNA molecules on a purple background.
Engineering the Microbiome: CRISPR Leads the Way
Mariella Bodemeier Loayza Careaga, PhD | Mar 15, 2024 | 10+ min read
Scientists have genetically modified isolated microbes for decades. Now, using CRISPR, they intend to target entire microbiomes.
A C-fern (Ceratopteris richardii) growing in a pot
Genome Spotlight: C-fern (Ceratopteris richardii)
Christie Wilcox, PhD | Sep 22, 2022 | 5 min read
Sequences for the model organism and two of its kin reveal how these plants got their oversized genomes.
Asthma, Genetics, and the Environment
Karen Young Kreeger | Apr 6, 2003 | 8 min read
Courtesy of Eric Erbe and Chris Pooley, ARS Image Gallery  SPRING CLEANING TARGETS: Tyrophagus putrescentiae, better known as dust mites, are microscopic, sightless, eight-legged arthropods that are natural inhabitants of indoor environments. Their droppings are the most common trigger of perennial allergy and asthma symptoms. Asthma is a classic example of gene-environment interaction. A host of environmental triggers, from cigarette smoke to cockroaches, can set it off. A dozen or so g
Genomes Gone Wild
Megan Scudellari | Jan 1, 2014 | 10+ min read
Weird and wonderful, plant DNA is challenging preconceptions about the evolution of life, including our own species.
The Genetics of Society
Claire Asher and Seirian Sumner | Jan 1, 2015 | 10 min read
Researchers aim to unravel the molecular mechanisms by which a single genotype gives rise to diverse castes in eusocial organisms.
a microscope image of a rotifer
Bacterial Enzyme Keeps Rotifers’ Transposable Elements in Check
Christie Wilcox, PhD | Mar 3, 2022 | 5 min read
Jumping genes in bdelloid rotifers are tamped down by DNA methylation performed by an enzyme pilfered from bacteria roughly 60 million years ago, a study finds.
The structure of a biological cell (macro)
The Long and Winding Road to Eukaryotic Cells
Amanda Heidt | Oct 17, 2022 | 10+ min read
Despite recent advances in the study of eukaryogenesis, much remains unresolved about the origin and evolution of the most complex domain of life.
Illustration showing two hands join, father or mother with child
Does Human Epigenetic Inheritance Deserve a Closer Look?
Catherine Offord | Apr 4, 2022 | 10+ min read
The concept of epigenetic inheritance has long been controversial. Some researchers hope that new data on cross-generational effects of environmental exposures will help settle the debate.
illustration of a mitochondrian inside a cell
Could Dad’s Mitochondrial DNA Benefit Hybrids?
Alejandra Manjarrez, PhD | Jan 20, 2022 | 7 min read
Studies have found that organisms can inherit mitochondria from male parents in rare instances, and both theoretical and experimental work hint that this biparental inheritance is more than just a fluke.
Genetic Parasites and a Whole Lot More
Barry Palevitz | Oct 15, 2000 | 10+ min read
Photo: Ori Fragman, Hebrew University Hordeum spontaneum, the plant studied for BARE-1 retroelements. With genome sequences arriving almost as regularly as the morning paper, the public's attention is focused on genes--new genes to protect crops against pests; rogue genes that make bacteria resistant to antibiotics; faulty genes that, if fixed, could cure diseases such as muscular dystrophy. What many people don't realize is that genes account for only part of an organism's DNA, and in many c

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