Man will become extinct as a result of The Shrinking Y chromosome?

© Kucoba.com Webmaster Tools | Blogger Tool

 

Compared to the hundreds of millions of years ago, the number of Y chromosome or chromosomes as males increasingly shrinking and feared to run out within the next hundred years. Does thus at some point later the male will become extinct?

Science knows his X chromosome as female chromosome and the Y chromosome as a male chromosome. Females have a pair of chromosomes XX and males have XY chromosome pair, though there is also a genetic disorder that makes people have 3 chromosomes e.g. XXY so obscure sex.

One thing that is always the question of experts is, why there is never a YY chromosome in males when there are XX chromosome pair in women? Experts say, the number of Y chromosome in males is indeed shrinking compared to hundreds of millions of years ago.

According to a study, the evolutionary process which occurs in humans make a Y chromosome in males increasingly shrinking. In comparison, the estimated number of Y chromosome are currently only 3 percent compared with 200 million to 300 million years ago.

Each cell in the human body has two chromosomes and sepaket DNA (deoxyribo nucleic acid) which is the genetic information. When these cells intersects itself, the pair of chromosomes that will exchange information through a process of genetic recombination that relate gratitude as it scrambles 2 Pack of playing cards and then divide it into 2 Pack.

However different from 45 other chromosomes in the human body, the Y chromosome does not have any genetic information in it. Consequently in the process of recombination, the Y chromosome does not ever get a pair that fits and is always paired with the X chromosome.

"The Y chromosome does not have a chance to survive, because there is never a 2 Y chromosome in a cell," said Jennifer Hughes, an expert on the genetics of the Whitehead Institute in Cambridge, Massachusetts as quoted from Livescience, Thursday (23/2/2012).

But fortunately, a recent research on apes Makaka (often) make sure there is nothing to worry about from the shrinking number of Y chromosome. in the last few hundred years indeed occur shrinkage, but certainly not going out at all.

Species of APE that is expected to begin to split from the line of kinship with humans since the 6 million years ago is reported to also experience the shrinking Y chromosome. Depreciation on apes going faster, but in fact this species still have male and female sexes.

While the conclusions of experts is drawn, the threat of extinction of the male gender is too exaggerated. The shrinking number of Y chromosome does happen very rapidly in the first few hundred years, but after that it will be stable and will not likely ever run out.