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tag male infertility genetics genomics immunology ecology

Microscopy image of the cnidarian <em>Hydractinia symbiolongicarpus&nbsp;</em>with cell nuclei stained blue and oocytes stained yellow
Ancient Immunoglobulin Genes Help Cnidarians Decide to Fight or Fuse
Sophie Fessl, PhD | Oct 11, 2022 | 4 min read
Immunoglobulin genes might have evolved much earlier than previously expected, perhaps even in the common ancestor of Cnidarians and Bilateria, a study suggests.
A colorful mandarinfish on a reef
Genome Spotlight: Mandarinfish (Synchiropus splendidus)
Christie Wilcox, PhD | Oct 28, 2021 | 3 min read
The high-quality genome sequence sheds light on the colorful nature of these popular aquarium fish.
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
Flies Invade Human Genetics
Ricki Lewis | Jun 21, 1998 | 9 min read
  DOUBLE WINGS: An ultrabithorax mutant fly has a total duplication of the body segment that carries wings. Recent issues of The American Journal of Human Genetics have featured a newcomer: Drosophila melanogaster. The fruit fly is a frequent star of a series of review articles called "Insights From Model Systems." The insect's appearance in a human genetics journal is a telling sign that this model among model organisms, long used to decipher the general principles of inheritance
Preimplantation Genetic Diagnosis: The Next Big Thing?
Ricki Lewis | Nov 12, 2000 | 9 min read
Courtesy of David Hill, ART Reproductive Center Inc.Two separated blastomeres subjected to FISH analysis to check the chromosomes. In early October, preimplantation genetic diagnosis (PGD) made headlines when a Colorado couple used assisted reproductive technology (ART) to have a baby named Adam, whose umbilical cord stem cells could cure his six-year-old sister Molly's Fanconi anemia.1 When Adam Nash was a ball of blastomere cells, researchers at the Reproductive Genetics Institute at Illinois
Illuminating Behaviors
Douglas Steinberg | Jun 1, 2003 | 6 min read
Courtesy of Genevieve Anderson If not for Nobel laureates Thomas Hunt Morgan, Eric R. Kandel, and Sydney Brenner, the notion of a general behavioral model might seem odd. Behaviors, after all, are determined by an animal's evolutionary history and ecological niche. They are often idiosyncratic, shared in detail only by closely related species. But, thanks to Morgan's research in the early 20th century, and Kandel's and Brenner's work over the past 35 years, the fly Drosophila melanogaster, t
Driving Down Pests
Amy Lewis | Aug 27, 2017 | 4 min read
A computer model estimates that gene-drive technology could wipe out populations of an invasive mammal on islands. 
Week in Review: May 26–30
Tracy Vence | May 30, 2014 | 4 min read
Human proteome cataloged; island-separated crickets evolved silence; molecule shows promise for combatting coronaviruses; study replication etiquette; another call for STAP retraction
Notebook
Eugene Russo | Dec 5, 1999 | 7 min read
Contents Pivotal pump Leptin limbo Clue to obesity Biotech Web site Helping hand Mapping malaria Notebook Pictured above are pigmented bacterial colonies of Deinococcus radiodurans, the most radiation-resistant organism currently known. DEINO-MITE CLEANUP In 1956, investigators discovered a potentially invaluable cleanup tool in an unlikely place. A hardy bacterium called Deinococcus radiodurans unexpectedly thrived in samples of canned meat thought to be sterilized by gamma radiation. The b

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