搜索结果: 91-105 共查到“国际动态 遗传学”相关记录247条 . 查询时间(2.418 秒)
美建种子库用于复活试验 将研究气候变化对植物进化造成的影响
保护生物多样性 植物进化
2016/3/11
超过500万粒种子如今正冷冻在美国科罗拉多州柯林斯堡的一间零下18摄氏度的地下室中，它们注定要等上50年，直到进化科学家获得许可用其进行试验。与大多数旨在保护生物多样性的种子库不同，“项目基线”计划被设计用来确保对植物正在如何进化以响应气候变化和环境退化进行精准的对照研究。这些种子采集自遍及美国大陆的250个地区，并被储存在该国农业部的一座设施中。这些种子代表了约60个物种。
Faulty bioelectric signal responsible for facial defects caused by rare genetic disorder
Faulty bioelectric signal facial defects genetic disorder
2016/2/23
Tufts University biologists have discovered the bioelectric mechanism by which the rare genetic disorder Andersen-Tawil syndrome (ATS) causes facial abnormalities, a finding that could lead to prevent...
Genetics help fish thrive in toxic environments,collaborative study finds
Genetics fish thrive toxic environments collaborative study
2016/2/23
They live in caves and springs throughout Mexico and thrive in water so toxic that most forms of life die within minutes.Meet the Atlantic molly – an extremophile fish that lives in toxic water full o...
同卵双胞胎为何有胖有瘦 科学家发现肥胖分子开关（图）
同卵双胞胎 遗传因素
2016/2/22
同卵双胞胎的体重并不一定相同，一项新研究或许给出了其中的答案。同卵双胞胎在所有的事情上几乎都一样，从眼睛的颜色到喜欢的食物，但他们却在一个最重要的特征上产生了分歧：那就是体重。一项新研究揭示了肥胖的一种分子机制，或许能够解释双胞胎中为什么一个人可以非常胖，而另一个人却又很瘦。
New optogenetic probe enables communication with neural microcircuits
New optogenetic communication neural microcircuits
2015/11/13
The burgeoning field of optogenetics makes it possible for scientists to control brain activity using pulses of light. Now, Brown University researchers have developed an optogenetic device which open...
Stanford engineers develop a wireless,fully implantable device to stimulate nerves in mice
Stanford engineers wireless fully implantable device stimulate nerves mice
2015/9/9
A miniature device that combines optogenetics – using light to control the activity of the brain–with a newly developed technique for wirelessly powering implanted devices is the first fully internal ...
遗传多样性影响人类身高和思维
遗传多样性 爱丁堡大学 英国医学研究委员会 遗传分析
2022/3/23
英国一个研究团队对各国人口基因的研究发现，得益于遗传多样性，人类进化得比祖先更聪明，并且身高更高了。这一发表在《自然》杂志上的研究首次回答了达尔文提出的遗传多样性有何益处的问题。
Genetic Study of ‘Co-Evolution’Could Provide Clues to Better Food Production
Genetic Study Co-Evolution Provide Clues Better Food Production
2015/7/13
In 1964, renowned biologists Peter Raven and Paul Erhlich published a landmark study that introduced the concept of co-evolution. Using butterflies and plants as primary examples, the team deter...
Iowa State University researchers discover surprisingly wide variation across species in genetic systems that influence aging
Iowa State University researchers surprisingly wide variation across species genetic systems
2015/6/18
A new Iowa State University study focusing on insulin signaling uncovered surprising genetic diversity across reptiles, birds and mammals.The research sets the stage for an improved understanding of m...
Genetic changes to basic developmental processes evolve more frequently than thought
Genetic changes developmental processes evolve more frequently than thought
2015/5/25
Newly evolved genes can rapidly assume control over fundamental functions during early embryonic development, report scientists from the University of Chicago. They identified a gene, found only in on...
New form of DNA modification may carry inheritable information
DNA modification carry inheritable information
2015/5/25
Scientists at the University of Chicago, Harvard University and the Chinese Academy of Sciences have described the surprising discovery and function of a new DNA modification in insects, worms and alg...
细胞端粒藏着长寿的秘密
细胞端粒 遗传学 美国斯坦福大学
2015/5/4
人类从未停止对生命的探索，其最原始的驱动力在于对“长生不老”的追求。衰老是一个非常复杂和缓慢的生命现象，导致衰老的原因有很多，从遗传学角度可以归因于基因组的不稳定性、端粒缩短和线粒体功能异常等。其中，端粒缩短是衡量衰老的一项首要指标。最近，美国斯坦福大学的研究团队发现了一种通过延长人体细胞端粒延缓衰老的方法，有望延长人类寿命。
基因分析证明美国是个“大混杂”（图）
基因分析证明 美国 大混杂
2014/12/24
有很高比例的非洲裔、欧洲裔以及拉丁裔美国人的祖先来自于其自我认同以外的种族。图片来源：《美国人类遗传学杂志》在美国，几乎没有一个人能够追溯到自己的祖先只来自于一个地方。根据一项新的研究，对很多人来说，他们的过去可能会让人感到惊讶。研究人员已经发现，有很高比例的非洲裔、欧洲裔以及拉丁裔美国人的祖先来自于其自我认同以外的种族。例如，一般而言，非洲裔美国人的基因组包含有1/4的欧洲人血统；而几乎4%的欧...
New method helps map species' genetic heritage
New method helps map species genetic heritage
2014/12/30
These questions seem simple, but are actually difficult for geneticists to answer. A new, sophisticated statistical technique developed by researchers at the University of Illinois and the University ...
Rice program models more detailed evolutionary networks from genetic data（图）
detailed evolutionary genetic data
2014/12/1
HOUSTON – (Nov. 12, 2014) – The tree has been an effective model of evolution for 150 years, but a Rice University computer scientist believes it’s far too simple to illustrate the breadth of current ...