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  • female mouse embryo
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Your search has returned 46 articles:
  • News

    Embryos kill off male tissue to become female

    Add a new ingredient to the sugar, spice and everything nice needed to make girls.

    A protein called COUP-TFII is necessary to eliminate male reproductive tissue from female mouse embryos, researchers report in the Aug. 18 Science. For decades, females have been considered the “default” sex in mammals. The new research overturns that idea, showing that making female reproductive organs is...

    08/17/2017 - 14:17 Development
  • News

    Common drugs help reverse signs of fetal alcohol syndrome in rats

    A common blood sugar medication or an extra dose of a thyroid hormone can reverse signs of cognitive damage in rats exposed in utero to alcohol. Both affect an enzyme that controls memory-related genes in the hippocampus, researchers report July 18 in Molecular Psychiatry.

    That insight might someday help scientists find an effective human treatment for fetal alcohol spectrum disorders,...

    07/18/2017 - 14:47 Health, Development
  • News

    How bearded dragons switch their sex

    When things get hot, embryonic bearded dragon lizards turn female — and now scientists might know why. New analyses, reported online June 14 in Science Advances, reveal that temperature-induced changes in RNA’s protein-making instructions might set off this sex switch. The findings might also apply to other reptile species whose sex is influenced by temperature.

    Unlike most mammals, many...

    06/14/2017 - 14:07 Development, Animals, Genetics, Epigenetics
  • Science Ticker

    Mouse sperm survive space to spawn

    Mouse sperm could win awards for resilience. Sperm freeze-dried and sent into space for months of exposure to high levels of solar radiation later produced healthy baby mice, researchers report May 22 in Proceedings of the National Academy of Sciences.

    If humans ever embark on long-term space flights, we’ll need a way to reproduce. One potential hurdle (beyond the logistical challenges...

    05/22/2017 - 15:00 Development
  • News in Brief

    Mouse sperm survive space to fertilize eggs

    Mouse sperm could win awards for resilience. Sperm freeze-dried and sent into space for months of exposure to high levels of solar radiation later produced healthy babies, researchers report online May 22 in Proceedings of the National Academy of Sciences.

    If humans ever embark on long-term space flights, we’ll need a way to reproduce. One potential hurdle (beyond the logistical...

    05/22/2017 - 15:00 Development
  • Teaser

    For calmer chickens, bathe eggs in light

    Fearful, flighty chickens raised for eating can hurt themselves while trying to avoid human handlers. But there may be a simple way to hatch calmer chicks: Shine light on the eggs for at least 12 hours a day.

    Researchers at the University of California, Davis bathed eggs daily in light for different time periods during their three-week incubation. When the chickens reached 3 to 6 weeks...

    02/06/2017 - 14:00 Animals, Development
  • Science Visualized

    How to make a fish face, and other photo contest winners

    View slideshow

    This forlorn-looking face of a 4-day-old zebrafish embryo represents “a whole new avenue of research” for geneticist Oscar Ruiz, who studies how faces and facial abnormalities develop at the cellular level.  

    The research is possible thanks to a new method, developed by Ruiz and colleagues at the University of Texas MD Anderson Cancer Center in Houston, for mounting...

    10/28/2016 - 10:15 Development, Science & Society
  • News

    In a first, mouse eggs grown from skin cells

    For the first time, researchers have grown eggs entirely in a lab dish.

    Skin-producing cells called fibroblasts from the tip of an adult mouse’s tail have been reprogrammed to make eggs, Japanese researchers report online October 17 in Nature. Those eggs were fertilized and grew into six healthy mice. The accomplishment could make it possible to study the formation of gametes — eggs and...

    10/17/2016 - 11:00 Cells, Development
  • News

    Scientists find clue to why mitochondrial DNA comes only from mom

    Scientists have found a clue to why one type of DNA is passed down to children by their mothers — but not their fathers.

    DNA inside energy-producing organelles called mitochondria is destroyed in a dad’s sperm shortly after it fertilizes an egg, researchers report online June 23 in Science. A protein called CPS-6 cuts apart the mitochondrial DNA in the male sperm so that the DNA can’t...

    06/23/2016 - 14:00 Cells, Development, Genetics
  • News in Brief

    Coral larvae feed on their baby fat

    For corals, baby fat is food. Coral mothers send their offspring into the world with a balanced meal of fat and algae, but baby corals mainly chew the fat, new research finds.

    Adult corals of the species Pocillopora damicornis get most of their nutrition from symbiotic algae that live inside them, providing metabolic energy by photosynthesis. But coral larvae, researchers report online...

    03/25/2016 - 14:00 Oceans, Animals, Development