Showing posts with label gene. Show all posts
Showing posts with label gene. Show all posts

10/08/2008

Exception to the law of inheritance Mendel

A group of geneticists from Purdue University in Indiana (USA), claims to have found in the plant Arabidopsis the corrected version of a defective gene inherited from their parents. Specifically, the plant was a carrier of two mutant copies of the gene, which allegedly was believed hitherto been impossible to have a normal offspring.

The researchers analyzed the mutated gene known as Hoth or exalted, for which the plant is not defective opened their flowers, and found that it had changed in 10% of the specimens that reproduced. It is as if a roofer.

in its genome, which has not yet been able to decipher, had retrieved the correct sequence in their genes. If confirmed the discovery, would be a rare exception in the laws inherited enunciated by the father of genetics, the Austrian monk Gregor Mendel in the nineteenth century.

7/23/2008

How to raise a giant rabbit

There are two methods to artificially alter the traits and qualities of animals: selective breeding and genetic manipulation. The latter involves the manipulation of genes in biotechnology laboratories.

For example, three years ago scientists from the August Cieszkowski Agricultural University in Poland, rabbits inserted in the gene for human growth hormone. The resulting transgenic animals were larger than the rest of their fellow human beings, although the real purpose of the experiment was that females produce this hormone for human therapeutic use, for example, children with growth problems.

Another way to alter the size of a rabbit is through selective breeding, a practice that farmers have been doing for thousands of years.
This is basically select copies with a quality and encourage their reproduction.
Thus, the Berlin keeper Hans Wagner has managed to breed giant rabbits with a weight of 8 to 10 kilos and a length next to Subway.

3/06/2008

Believe viral defence in lab

A team of Canadian scientists of the University McGill has discovered in a lab the way to potentialize the natural defense system of an organism against the viruses, making potentially to the immune cells to the flu and other attacks humans.

In spite of the good apparent notice, the scientists assure that for the moment this process cannot be carried out in human cells, but in spite of this, they assure that the technique could help to the development of antiviral new therapies.

The key of the process is the stimulation of the protein interferon that are in the battle front that you have each cell against the virus attack. To boost your production, the investigators were able to delete two key genes in mice that allowed a bigger interferon production, that that in turn blocked the virus playback, especially those responsible for the flu.

This fed the expectations about the possibility of combatting a variety of strains responsible for the lives of millions of people, the famous pandemics, as the one that currently threatens us, the famous flu to prepare.

Now, the following step is to achieve it with human, maybe with another technique but with the same results. Also, abnormalities or side effects were not detected so in the lab mice the scientists they are already hands to the work to design a drug that can behave in the same way in the gene human.

11/29/2007

Key gene in Feminine Orgasm

Partly, it is determined that the woman's orgasm is determined by its genes. It cannot be suggested that the blame is completely in cultural or other influences, according to a new study.
The experts in the topic suggest that that is possible that it will be interpreted like a news so much good as bad.
''Va to be annoying because some women will think that they maybe are not able to [to have an orgasm for genetic questions].
And on the other hand, it eliminates certain blame type '', the doctor commented Virginia Sadock, director of the program of human sexuality of the Medical Center of the University of New York.
In any way, the specialists of the topic suggest that the results of the studies don't mean that the women that inherit a problematic gene are before the possible lack of a good orgasm. Simply that one needs more patience and work.
The main benefit of discovering the genetic elements of the sexuality--as the experts comment--it is the one of being able to collaborate to the scientists to find the best treatments for the sexual problems. The new study was published behind weeks in Biology Letters, magazine that publishes the Real Society, the independent academy of sciences of Great Britain.
In the study, the scientists of the Hospital St. Thomas in London sent questionnaires to 4,037 women that are part of a registration of twins in England.
50% of these women was twin identical and the other 50 non identical%.
33% of the women indicated that never, or hardly ever, it had gotten an orgasm during the sexual act and 21% he/she said that it never achieved a climax in a masturbation.
Those figures are equivalent according to other studies carried out in the previous decades. But the questionnaires found a significant influence genetics in the capacity to arrive to the orgasm, the main investigator, Tim Spector said, expert in genetics of the Hospital St. Thomas.
The similarity in the experience of the orgasm was bigger in the identical twins than in those no identical, Spector said.
As the only difference among the two groups was genetic,
the scientists think that the difference among the groups was only the genetics.
After looking for other factors that could influence in the orgasm and they didn't find them, the scientists estimated that 34% of the difficulty that some women possess to arrive to the orgasm during the sexual act he/she is due to the genes.