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Inspiring Science

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Inspiring Science

Category Archives: Development

Book Review: Born Anxious

12 Wednesday Apr 2017

Posted by sedeer in Books, Development, Disease, Genetics, Humans

≈ 2 Comments

Tags

Behavior, biology, Developmental biology, Gene expression, Health, Popular science, science, science and society, Science in Society

I enjoyed Born Anxious more than I expected to but less than I hoped. Written by Daniel Keating, a psychology professor at the University of Michigan, it synthesizes over a decade of research on how stress affects the course of our lives. Keating presents an interesting and convincing case that experiences early in life — or even in previous generations — can set biological switches that have wide-ranging consequences, affecting health, social well-being, and professional success. Continue reading →

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Book review: We Are Our Brains

28 Wednesday May 2014

Posted by sedeer in Books, Development, Humans, Mind

≈ 4 Comments

Tags

biology, book, book review, brain, mind, neuroscience, Popular science, science, Science communication

'We Are Our Brains' by Dick SwaabI have mixed feelings about We Are Our Brains. The author, Dick Swaab, is a professor of neurobiology at Amsterdam University with decades of research experience and many awards to his name, so the book is full of fascinating and intriguing information. Unfortunately, I felt like the delivery was somewhat lacking, leaving me with more questions and wanting more information. That’s not inherently a bad thing, but I feel like the book could have done a much better job of handling some of the inevitable questions and challenges it raises — it could benefit from engaging in dialogue with the reader rather than simply making assertions. Continue reading →

The give-and-take between mothers and their offspring

27 Tuesday May 2014

Posted by sedeer in Development, Evolution, Genetics

≈ 10 Comments

Tags

animals, biology, Developmental biology, Education, evolution, Genetics, imprinting, nursing, offspring, Popular science, science

Image credit: Flickr user nekrumThis is a story about a gene which makes nursing mice produce more nutritious milk while also making their offspring less demanding. The gene serves to balance nutrient supply and demand between the mother and pup. If the gene is knocked out, the mother’s milk is less rich, but the pups are more demanding, evening out the impact. Things only go wrong when there’s a mismatch. If pups with a defective copy of the gene feed from a normal mother, their increased demand makes them grow larger than normal. Conversely, pups with a good copy end up smaller if they feed from a mother lacking a working copy, since her milk is less nutritious. Continue reading →

Controlling development by the numbers

30 Wednesday Oct 2013

Posted by sedeer in Development, Genetics, Vertebrates

≈ Leave a comment

Tags

animals, backbone, biology, Developmental biology, Gene, Gene expression, notochord, Popular science, science

An embryo of the sea squirt Ciona. The nuclei of the 40 notochord cells are highlighted in red  and the contours of a few notochord cells are defined by green fluorescent protein. All other visible nuclei are colored in blue. (Image Credit: Janice H. Imai and Anna Di Gregorio)Genes have to be carefully coordinated to switch on at just the right moment in development in order to make a mature, complex embryo out of just a single cell. Scientists working at the Weill Medical College of Cornell University in New York have discovered how this coordination is accomplished. In a paper just published in PLOS Biology, they describe how the gene Brachyury controls the timing of a cascade of genes involved in a crucial process in vertebrate development. Continue reading →

The viruses that made us

29 Wednesday May 2013

Posted by sedeer in Development, Evolution, Genetics, Humans, Mammals

≈ 10 Comments

Tags

biology, DNA, evolution, Genome, horizontal gene transfer, Popular science, science, virus

Enterobacteria phage λ, Lambda phage-coliphage λ, José F. Vargas, http://elnefashu.deviantart.com/ (Photo credit: PHYLOMON)Viruses make their living by breaking into cells and using the machinery and energy in the cell to reproduce.  Once inside, some viruses immediately hijack the cell and make copies of themselves which burst out into the world to infect new cells.  Other viruses take a staid approach, though.  Instead of taking over the cell, they quietly slip a copy of their genes into its DNA.  When the cell divides, it copies the newly acquired viral genes along with the rest of its genome.  It’s a better deal for the virus, since all of the cell’s descendants will be carrying viral genes which can eventually come out of hiding to commandeer the cell and replicate.  A really lucky virus is one that finds itself inside an egg cell.  Getting into the DNA of a single cell means getting copied into all of its daughter cells, but getting into the DNA of an egg cell means getting copied into every cell in the organism that grows from the egg…and from there into all of the organism’s offspring.  Lucky viruses that succeed in pulling off that trick can still break out and cause trouble, but they can also become integrated into their host’s genome; instead of struggling to reproduce, they can then just kick back and enjoy the ride while we lumber along, making copies of them whenever we make new cells or have children. Continue reading →

Sex, hormones, and the microbiome

02 Thursday May 2013

Posted by sedeer in Bacteria, Development, Mammals

≈ 10 Comments

Tags

Autoimmune disease, Bacteria, biology, Diabetes mellitus type 1, Gut flora, Health, microbes, microbiome, Popular science, science

The microbiome — the kilogram of microbes that each of us carries around — has been shown to be involved in everything from obesity and type 2 diabetes to behaviour and sexual preferences.  The composition and effects of the microbiome are very active areas of research, producing results which have challenged the way we think about the evolution and interactions of organisms, including ourselves.  In a paper recently published in the journal Science, researchers showed for the first time that the make up of the microbiome differs between the sexes, linking these differences to changes in hormone levels and disease resistance.
Continue reading →

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All text and original images by Sedeer El-Showk. Licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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