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Chromosomes

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Uploaded by on Aug 3, 2007

Chromosomes

Chromosomes contain the genetic material deoxyribonucleic acid or DNA. In association with proteins, the twisted strands of DNA become coiled and folded to give chromosomes a beaded appearance. Each bead represents a gene-a length of DNA coding for the synthesis of one or more proteins. There are thought to be more than five hundred genes on each of the cell's forty-six chromosomes. Here a progression is shown from a chromosome, as it appears under the microscope, to the molecular architecture of DNA, shown diagrammatically to illustrate the double helix. The chromosome content of every cell in the body consists of forty-six individual chromosomes, except for the sperm and ova, which have only twenty-three. Highly magnified, this chromosome set shows the X (red) and the Y (blue) sex chromosomes. A combination of X and Y denotes male characteristics, while an XX pair results in the birth of a girl. Since sperm contain either X or the Y chromosome and the ova only the X, sex is governed by the sperm.

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  • wtf haters this is art dudes

  • thanks your really helping my school work :)

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  • do each of the 46 chromosomes contain different gens from one another & are they found 46 in each cell ?

  • gay.

  • Hal 95

  • "each bead represent a gene" this is sooooooo wrong !!!

    because each bead contain 146 bp .... what is that gene that only made of 146 bp !!!

  • @ilikechess1 i know man, i'm just saying that the image shows 46 pairs, NOT 23 pairs. if you count them, you can see. If they are homologs then this is a false image but if they are sister chromatids that have been suspended during pro metaphase or metaphase then i guess thats ok. I'm just saying that its really confusing to some one who is trying to learn about chromosomes because my little sister is learning about genetics and she couldn't get it and asked me. Thanks for the help anyway man

  • @delic619 dude there are actually 46 chromosomes in total because you have 22 chromosomes * 2 because you have 2 copies of each plus the X and Y chromosome so that makes it 46 not 92

  • this is wrong. The image at 48 seconds showed 46 pairs of chromasomes - 92 chromasomes in total.

  • yay!! like this..

  • fuckin chromosomes

  • man fuck chromosomes they can suck my dick

    i love chromosomes

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