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Home > News > Tags > chromosome
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Stories about: chromosome |
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A team of scientists at the Max Planck Institute for Molecular Genetics in Berlin, along with peers at the German Cancer Research Center in Heidelberg and at the Leibniz Institute for Age Research – Fritz Lipmann Institute in Jena have carried out a research on the division of cancer cells through the complex p... |
4 September 2010
04:06 GMT |
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A very specific class of obese patients may not owe their condition to a life of excesses, but to a missing set of genes that can no longer be found on one of their chromosomes. A research group has, in fact, determined that a piece of the chromosome is missing entirely. This may help scientists get a new perspective... |
9 December 2009
14:01 GMT |
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By analyzing the genomes of some 10,000 patients – 2,000 who had developed aneurysms and approximately 8,000 healthy individuals – two Yale professors managed to identify three chromosomal segments, named loci, where variations in the make-up of various genes cause increased risks of sufferers developing ... |
10 November 2008
06:37 GMT |
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We know that boys have XY sex chromosomes, while girls have XX. However, in some cases, newborn girls can be XY. A new research published in the Nature journal clarifies why some XY embryos, instead of being born as males, develop ovaries and evolve as girls: it's because of a gene called Sox9, involved in forma... |
9 May 2008
14:06 GMT |
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There is no doubt that the English language rooted from a dialect brought in Britain from northern Germany. When Romans left Britain at the beginning of the 5th century, Britain fragmented in small Celt kingdoms and rival domains, which employed Germanic mercenaries in their inner fights, or against the Picts (a seem... |
5 May 2008
04:58 GMT |
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Sex is considered the engine of the evolution. Without sex, we would all be similar clones. Sex brings diversity, but also it can repair the effects of negative mutations. Healthy genes from one parent can counteract the presence of a damaged (mutated) gene from the other parent, resulting healthier offspring. Thus, ... |
7 April 2008
05:23 GMT |
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Those thousands of knights went to the Middle East during the 11th-13th centuries to free the Holy Land from the hands of the Muslims, but despite their religiosity, they found some moments to have some hanky-panky. In the end, their wives from England, France, Germany and Italy were far away and many ended mixing wi... |
28 March 2008
17:41 GMT |
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Mexican men know the secret of the chili. It's about folate, a vitamin abundant in liver, leafy green vegetables, citrus fruits, sunflower seeds and legumes (beans and their relatives). It may sound more familiar to you that women of child-bearing age must have proper levels of folate (vitamin B9) in their diet ... |
20 March 2008
14:06 GMT |
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It seems simple: XX sex chromosomes make a female, XY sex chromosomes make a male. But sex is an evolutionary achievement which did not appear just like that. A new research published in the journal "PLoS" points to the great similarities between the DNA sequences that determine the sex of plants and animals and the ... |
18 March 2008
14:06 GMT |
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Just having a XY sex chromosome formula won't make you a man. Nor the XX formula makes you a woman. Increasing evidence shows that human sex is not caused by sex chromosomes, but by genes placed on those chromosomes. Over 50 genes involved in sex expression have been found so far. 7 operate in the brain even bef... |
15 March 2008
04:53 GMT |
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The remote control saves you from wasting too much energy changing the channels. The only problem is that now and then you have to go to the bathroom.... Damn it! But don't worry: you will be saved of too much effort, as you will live 10 years less because of this couch potato lifestyle. This is the result of a ... |
30 January 2008
02:57 GMT |
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Kids look like their parents or grandparents, and brothers and sisters look alike. How can you predict the traits of your future child? This is the science of heredity. Heredity operates on genes (made of DNA) placed on chromosomes, located inside a cell's nucleus. Each human has 46 chromosomes, arranged in 23 p... |
15 January 2008
16:06 GMT |
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Males change faster than females. Just look at a peacock's tail feathers compared to the plain peahen. In most species, males are brighter and better singers, competing for getting as much as possible mates. This way they experience sexual selection. This overdrive compared to females puzzle the scientists, as t... |
15 November 2007
06:19 GMT |
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There is a sex ratio of about 1:1 in most species, including humans, meaning that an approximately equal number of males and females are produced. For the first time, geneticists at Emory University in Atlanta, Georgia, have discovered a genetic mechanism delivering this balanced ratio, at least valid for fruit flies... |
7 November 2007
06:42 GMT |
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Being male or female is decided from the womb. And in most cases, the key is held by sex determination genes on the sex chromosomes. The genes connected to sexual development have evolved remarkably little along the evolutionary of our race. Opposite sex determining genes, sex chromosomes are among the most fast chan... |
22 October 2007
14:06 GMT |
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The classic knowledge states that men have an XY pair of sex chromosomes, while women an XX one. Recent studies showed that many genes can bypass this arrangement and turn XX individuals into men. Now, a German-American team has discovered that the body's reactivity to testosterone is even more important than th... |
20 October 2007
03:58 GMT |
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Some play God and play it tough. The famous US scientist Craig Venter is going to create the first ever artificial life form. He has managed to build a synthetic chromosome employing chemicals obtained in the lab and the new achievement could lead to new energy sources to fight off the negative effects of global warm... |
8 October 2007
02:54 GMT |
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The sex chromosomes come with nasty effects, like the fragile X Syndrome (FXS), a genetic disease experienced by about one in 4,000 males and one in 6,000 females, and it is the most common cause of genetic mental impairment. The mutation of the FMR1 leads to the synthesis of an inactive FMR1 protein, named the fragi... |
12 September 2007
06:45 GMT |
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Some men cut off their penises and balls to 'become' women. Some women shoot tones of testosterone into their veins to 'become' men. But a University of Adelaide team has found a method of getting a male mouse lacking the Y "masculinizing" chromosome by manipulating a single gene in the developing... |
20 August 2007
14:06 GMT |
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After running through all options, in vitro fertilization (IVF) is the last stop. By then, most women are already around their 40's. But with the increasing age, the chances to give birth to malformed or genetically diseased babies are high. That's why many of these women undergo pre-implantation genetic ... |
5 July 2007
04:29 GMT |
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Currently, we can see mammoths only in animation, but modern science could bring back them 'live and kicking'. DNA, the heredity molecule, has everything to do with this issue. Complete DNA sequences have been decoded for many living species, like humans, dogs and mice. And the DNA of long-extinct species c... |
27 June 2007
05:17 GMT |
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95 % of our genome has been thought to be just junk, or simply a useless desert. Up until now, as some scientists have started to disagree on this idea. One of them is Professor Alexandre Reymond, from the Center for Integrative Genomics, University of Lausanne, Switzerland and the Department of Genetic Medicine, Uni... |
20 June 2007
04:49 GMT |
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Maleness is given by that Y chromosome that leads to the XY formula while females are XX, with two X chromosomes. That's why in the early development of the female fertilized egg, one of the two X chromosomes must be silenced. When by accident this does not happen, severe genetic diseases get installed. Both X c... |
13 June 2007
14:06 GMT |
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When chromosomes divide, they look like molecular Siamese twins: two stretches of DNA joined along a portion named the centromere. Centromeres ensure that when the new two DNA molecules separate, new cells present the right DNA amount. The origin of the centromeres is unknown. A new controversial theory states that c... |
5 June 2007
05:16 GMT |
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Scientists come with increasing evidence that human sex is not determined by sex chromosomes but by genes placed on those chromosomes. This may explain the numerous cases of ambiguous genitalia in humans and why an individual's genitals might not match the reproductive organs inside. "What really matters is what... |
22 May 2007
17:31 GMT |
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Kangaroos hit again on one of the myths of the sex genetics. When it was discovered in the early '90s, the XIST gene was regarded as essential in the process of inactivating the supplementary X chromosome in females. The gene has been believed to switch off the extra X chromosome during embryonic development and... |
1 May 2007
07:19 GMT |
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We all know that in mammals, humans included, sex determination is chromosomal. That means that the composition of the chromosomes determines the gender of the individual: XX (two X chromosomes) means female, XY (one X chromosome and one Y chromosome) - male. Genes on Y are masculinizing, that's why in chromosom... |
22 March 2007
08:16 GMT |
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