Drop Down MenusCSS Drop Down MenuPure CSS Dropdown Menu

Try with us

Join & Get Updates

Saturday, January 18, 2014

Is it true that the Men will be extinct?

Jenny Graves, a professor of the University of Melbourne, Australia, based on the results of her research has stated that the Y chromosome, will be extinct in 5 million years. According to Prof Grave, as quoted by the Daily Mail on April 2, 2013, saying that the extinction of the Y chromosome associated with depreciation. Depreciation will continue to take place so that within a period of 5 million years, the Y chromosome will be lost. (Jump to related article).
Is the Y chromosome doomed to disappear? That's not the case, according to a new study. Scientists have found that the common notion that the Y's genes are mostly unimportant and that the chromosome is destined to dwindle and disappear is actually untrue. This image shows human X (on left), and Y chromosome. (Picture from: http://www.sci-news.com/)

Is such a scenario it would be real?
Melissa Wilson Sayres, an evolutionary biologist from the University of California, Berkeley, doing research to perform genetic analysis on 8 Caucasians and 8 African men. The research results challenge the Grave's theory. "The Y chromosome in humans will still last a long time," said Sayres.
A new study has challenged the notion that Y chromosomes are largely unimportant and will no longer exist in the next 5 million years. (Picture from: http://www.counselheal.com/)
Sayres confirmed that the Y chromosome is shrinking. Several hundred million years ago, the Y chromosome has the same number of genes and the size of the X chromosome. However, now the Y chromosome has only 27 unique genes, while the X chromosome still has 800 genes.

Shrinkage occurs because the Y chromosome does not have a partner, not as 22 chromosomes and the X chromosome of the human body Due to not have a pair, the Y chromosome can not perform a useful process of genetic recombination to repair the damage due to mutation. Finally, the damage continues to accumulate until finally the DNA is disposed and chromosomal continues to shrink.

However, despite Sayres agree that the shrinkage of the Y chromosome, and she denied that the depreciation will bear to the extinction of the Y chromosome in 5 million years. Based on Sayres research results, a Y chromosome variation on the study object is low.

"We show that the selection model that is applicable to purification of the Y chromosome to eliminate harmful mutations, with a moderate reduction in the number of men who inherited their Y chromosome, it could explain the Y chromosome diversity is low," she said.

"Natural selection has prevailed on the Y chromosome and the gene has maintained quite well. All evidence indicates that the Y chromosome would be lost," said Sayres as quoted by The Guardian, on Thursday, January 9, 2014.. *** [EKA | FROM VARIOUS SOURCES | DAILY MAIL | GUARDIAN] Note: This blog can be accessed via your smart phone.
Enhanced by Zemanta
Kindly Bookmark and Share it: