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Gene plays major role in brain development

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IMAGE: Fluorescence image of two zebrafish embryos - After switching off the Plexin-A1 gene (bottom), malformations of the nervous system occur, such as a pathological enlargement of the neural fluid spaces.
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Credit: Dr. Gabriel Dworschak / University of Bonn
When the Augustinian monk Gregor Mendel crossed white-flowering with purple-flowering pea plants in the mid-19th century, he made an interesting discovery: The offspring were all purple. He therefore called this trait dominant, while the white blossom color was recessive. The reason for this phenomenon: In peas, each gene occurs twice. One version comes from the maternal plant and the other from the paternal plant. If a pea has inherited the gene for purple flower color from one parent, but the gene for white flower color from the other, purple wins. Only when two genes for white flowers come together in the offspring plant is it white. ....

United States , United Kingdom , Saudi Arabia , Baylor College Of Medicine , Nordrhein Westfalen , Benjamin Odermatt , Heiko Reutter , Gabrielc Dworschak , Gabriel Dworschak , Gregor Mendel , Jaya Punetha , University Of Bonn , Institute Of Anatomy , Institute Of Human Genetics , University Children Hospital , University Hospital Bonn , University Children , University Hospital , Human Genetics , Baylor College , Medicine Health , Developmental Reproductive Biology , ஒன்றுபட்டது மாநிலங்களில் , ஒன்றுபட்டது கிஂக்டம் , சவுதி அரேபியா , பேலர் கல்லூரி ஆஃப் மருந்து ,

Mass of human chromosomes measured for the first time

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IMAGE: The spread of 46 human chromosomes measured using X-rays in the study, with colour added.
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Credit: Archana Bhartiya et al/ Chromosome Research
Mass of human chromosomes measured for the first time
The mass of human chromosomes, which contain the instructions for life in nearly every cell of our bodies, has been measured with X-rays for the first time in a new study led by UCL researchers.
For the study, published in
Chromosome Research, researchers used a powerful X-ray beam at the UK s national synchrotron facility, Diamond Light Source, to determine the number of electrons in a spread of 46 chromosomes which they used to calculate mass. ....

United Kingdom , City Of , Archana Bhartiya , Professor Ian Robinson London Centre For Nanotechnology , London Centre For Nanotechnology , Chromosome Research , European Research Council , Sciences Research Council , Us Department Of Energy , Diamond Light Source , Professor Ian Robinson , London Centre , Human Genome Project , Biological Sciences Research Council , Physical Sciences Research Council , Cell Biology , Developmental Reproductive Biology , Medicine Health , ஒன்றுபட்டது கிஂக்டம் , நகரம் ஆஃப் , லண்டன் மையம் க்கு நானோ தொழில்நுட்பம் , குரோமோசோம் ஆராய்ச்சி , ஐரோப்பிய ஆராய்ச்சி சபை , அறிவியல் ஆராய்ச்சி சபை , எங்களுக்கு துறை ஆஃப் ஆற்றல் , வைரம் ஒளி மூல ,

Seabirds face dire threats from climate change, human activity — especially in Northern Hemisphere

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IMAGE: A common murre delivering an anchovy to its chick on Southeast Farallon Island, California.
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Credit: Ron LeValley
Many seabirds in the Northern Hemisphere are struggling to breed and in the Southern Hemisphere, they may not be far behind. These are the conclusions of a study, published May 28 in
Science, analyzing more than 50 years of breeding records for 67 seabird species worldwide.
The international team of scientists led by William Sydeman at the Farallon Institute in California discovered that reproductive success decreased in the past half century for fish-eating seabirds north of the equator. The Northern Hemisphere has suffered greater impacts from human-caused climate change and other human activities, like overfishing. ....

United States , P Dee Boersma , William Sydeman , University Of Washington , Farallon Institute , Farallon Institute Eurekalert , Uk Centre For Ecology Hydrology , Northern Hemisphere , Southern Hemisphere , South American , Punta Tombo , Developmental Reproductive Biology , Ecology Environment , Marine Freshwater Biology , Zoology Veterinary Science , Climate Change , ஒன்றுபட்டது மாநிலங்களில் , ப் டீ போர்ஸ்மா , பல்கலைக்கழகம் ஆஃப் வாஷிங்டன் , ஃபாரல்லன் நிறுவனம் , இங்கிலாந்து மையம் க்கு சூழலியல் ஹைட்ராலஜி , வடக்கு அரைக்கோளம் , தெற்கு அரைக்கோளம் , தெற்கு அமெரிக்கன் , பூண்ட டோம்போ ,

Embryos of many species use sound to prepare for the outside world

It s well known that reptiles depend on temperature cues while in the egg to determine a hatchling s sex. Now, researchers writing in the journal Trends in Ecology & Evolution on May 26 say that embryos of many different animal species also rely on acoustic signals in important ways. They call this phenomenon acoustic developmental programming. ....

Mylene Mariette Mylenemariette , Deakin University , Mylene Mariette , Cell Press , Developmental Reproductive Biology , Ecology Environment , Zoology Veterinary Science , டீக்கின் பல்கலைக்கழகம் , செல் ப்ரெஸ் ,

Telomere length, a longevity measure, may be determined early in life

One of the first studies to examine telomere length (TL) in childhood finds that the initial setting of TL during prenatal development and in the first years of life may determine one s TL throughout childhood and potentially even into adulthood or older age. The study also finds that TL decreases most rapidly from birth to age 3, followed by a period of maintenance into the pre-puberty period, although it was sometimes seen to lengthen. ....

Jie Yu , Whitney Cowell , Julie Herbstman , Jia Guo , Andreaa Baccarelli , Deliang Tang , Columbia Center , Columbia Mailman School , Environmental Protection Agency , Icahn School Of Medicine At Mount Sinai , National Institutes Of Health , Environmental Health , Columbia University Mailman School , Columbia Mailman , Icahn School , Shuang Wang , Frederica Perera All , Fine Foundations , National Institutes , Developmental Reproductive Biology , Medicine Health , Environmental Health , ஜிே யூ , விட்னி சவுல் , ஜியா கூவோ , கொலம்பியா மையம் ,