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  1. Y

    by , 30th-April-2011 at 12:08 AM (Misandry and Fathers)
    The Y Chromosome is passed from generation to generation, father to son. The DNA in the Y chromosome virtually remains the same in each generation, meaning, the DNA will match even after many generations.
    Y Chromosome

    Only a male carries and passes the Y Chromosome. Almost every human has 46 chromosomes (23 pairs). 44 of these chromosomes are Nuclear DNA, non-sex chromosomes. The other 2 are sex chromosomes, the female has X, X (2 X chromosomes), and the male has and X, Y.


    For genealogy purposes, Y chromosome testing has become extremely significant to the study. This can be interpreted as the surname DNA test; if you match with others, this proves a relation. Your Y chromosome can tell

    In females, the sex chromosomes are the 2 X chromosomes. Males have one X chromosome and one Y chromosome. The presence of the Y chromosome is decisive for unleashing the developmental program that leads to a baby boy.

    http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/SexChromosomes.html

    The human Y chromosome has now been sequenced and published in the June 19, 2003 issue of Nature. The article explains the evolution of the Y chromosome at genetic level. It also serves to illustrate the structure of a chromosome in general. The followings is an attempt to summarize the main features in the article.
    Y Chromosome
    Cameras roll as ancient-DNA experts Carsten Pusch and Albert Zink scrutinize a row of coloured peaks on their computer screen. There is a dramatic pause. "My god!" whispers Pusch, the words muffled by his surgical mask. Then the two hug and shake hands, accompanied by the laughter and applause of their Egyptian colleagues. They have every right to be pleased with themselves. After months of painstaking work, they have finally completed their analysis of 3,300-year-old DNA from the mummy of King Tutankhamun.
    Cameras roll as ancient-DNA experts Carsten Pusch and Albert
    ...
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    Fathers
  2. Men more evolved? Y chromosome study stirs debate

    by , 15th-January-2010 at 08:17 PM (Misandry and Fathers)

    · By SETH BORENSTEIN, AP Science Writer Seth Borenstein, Ap Science Writer– Wed Jan 13, 4:28 pm ET
    WASHINGTON – Women may think of men as primitive, but new research indicates that the Y chromosome — the thing that makes a man male — is evolving far faster than the rest of the human genetic code.
    A new study comparing the Y chromosomes from humans and chimpanzees, our nearest living relatives, show that they are about 30 percent different. That is far greater than the 2 percent difference between the rest of the human genetic code and that of the chimp's, according to a study appearing online Wednesday in the journal Nature.
    These changes occurred in the last 6 million years or so, relatively recently when it comes to evolution.
    "The Y chromosome appears to be the most rapidly evolving of the human chromosomes," said study co-author Dr. David Page, director of the prestigious Whitehead Institute in Cambridge and a professor of biology at MIT. "It's an almost ongoing churning of gene reconstruction. It's like a house that's constantly being rebuilt."
    Before men get too impressed with themselves, lead author Jennifer Hughes offers some words of caution: Just because the Y chromosome, which determines gender, is evolving at a speedy rate it doesn't necessarily mean men themselves are more evolved.
    Researchers took the most detailed examination of the Y chromosome, which females do not have, of both humans and chimps and found entire sections dramatically different. There were even entire genes on the human Y chromosome that weren't on the chimp, said Hughes, also of the Whitehead Institute.
    The two-year research took twice as long as expected because of the evolutionary changes found, Hughes said.
    There is a bit of a proviso to the comparison to other chromosomes. While all human and chimp chromosomes have been mapped, only two chimp chromosomes have been examined in great detail: Y and chromosome ...
    Tags: y-chromosome
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