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  1. #1
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    isochromosome ending up in TURNER.plz help

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    it is written in kaplan bio that "karyotype of an isochromosome for the long arm of X wud b 46X,i[Xq]. this karyo results in Turner syndrome,indicating that most of the critical genes responsible for Turner phenotype r on Xp". my question is that this fellow didnt get any p then how did she bcome a Turner?

  2. #2
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    Absence of 2nd gene causes Turners syndrome

    It is the absence of the second chromosone OR the abnormality of the
    second chromosone that causes Turner's syndrome where the ovaries
    do not develop.

    Signs are
    Short height such as below 5ft
    webbed neck
    sheild chest (nipples are spread far apart and not developed)
    hypergonadotropic hypoestrogenic amenorhea

    Concepts
    aneuploidy - change in number of chromosones. additional, missing
    monosomy - missing chromosone, in humans only 45,X karyotype
    karyotype - ordering of chromosones by length and position of centromere
    or the notation
    isochromosone - a chromosone with identical arms that are mirror images
    of each other. (edit this later)
    p - petite arm of chromosone
    q - long arm is of chromosone is the next letter in alphabet

  3. #3
    anithedoc is offline Newbie 510 points
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    Quote Originally Posted by gluconeogenesis View Post
    It is the absence of the second chromosone OR the abnormality of the
    second chromosone that causes Turner's syndrome where the ovaries
    do not develop.

    Signs are
    Short height such as below 5ft
    webbed neck
    sheild chest (nipples are spread far apart and not developed)
    hypergonadotropic hypoestrogenic amenorhea

    Concepts
    aneuploidy - change in number of chromosones. additional, missing
    monosomy - missing chromosone, in humans only 45,X karyotype
    karyotype - ordering of chromosones by length and position of centromere
    or the notation
    isochromosone - a chromosone with identical arms that are mirror images
    of each other. (edit this later)
    p - petite arm of chromosone
    q - long arm is of chromosone is the next letter in alphabet


    u piece of pooh pooh...dat doesnt explain the q asked..if u dont know d ans dont write pooh pooh dat ever1 knows..

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