Anonymous
Anonymous asked in Science & MathematicsBiology · 1 decade ago

chromosomes in a human cell?

In a human cell, there are 46 chromosomes, i know this means that each human cell contains two sets of chromosomes. Does this mean that each cell has two of every chromosome? because i know that homologous chromosome are made up of two different chromosomes.one from the father and one fromt he mother. can someone please explain this to me.

Update:

So..why are te mother and father chromosomes identical?

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  • 1 decade ago
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    Humans have 23 pairs of chromosomes. They acquire one of the pair from the mother and the other from the father. So to answer your question, yes, humans do have two of every chromosome in each cell, except in the sex cells where only half the genetic information is present.

    Edit: The chromosomes from the mother and father are by no means identical. It is true that each pair contains certain genes and will go on to express specific traits but this does not mean that they are identical. This is what is means by genetic variation. For example, the genes for eye colour are different in different people. Under a microscope they make look similar but the genetic structure will be entirely different.

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  • Anonymous
    1 decade ago

    There are two of every chromosome except the X and Y. Women have two X chromosomes, men have an X and a Y. The mother and father chromosomes are not identical, that's why people are not identical. You get one of each pair from each parent, like flipping a coin 46 times.

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  • N E
    Lv 7
    1 decade ago

    Yes, each human body (somatic) cell has one set of 23 chromosomes from the father and one set of 23 from the mother for a total of 46 chromosomes (23 pairs of homologous chromosomes). So, each cell has two of each chromosome (a pair of each chromosome).

    The mother's and father's chromsomes are different and not identical. The genetic sequence is different for each chromosome in a pair, although there are a *lot* of similarities between DNA sequences when a chromosome is compared to its pair. The chromosomes are considered a pair because of their size and banding patterns and because we know that there is a lot of DNA sequence similarity between the chromosomes in a pair, but they are not identical.

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  • 1 decade ago

    basically when the sex cells come together they each have half of a strand of DNA. The strands combine making a whole strand. The chromosomes come in pairs (but each of part of a pair may not be the same info) . The mother and father chromosomes are not identical in the information that they have on them. The mother may have the info for green eyes and the father may have the info for blue eyes but they are still info for eyes.

    Source(s): *note: this is a very basic definition...each chromosome may carry information for lots of different traits, some of which are not acctually seen in the person http://learn.genetics.utah.edu/content/begin/tour/ http://www.molecularstation.com/science-videos/vid...
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  • 1 decade ago

    The total 46 chromosomes are made up of 22 pairs of autosomal (or 22 pairs of building block of instructions), plus 1 pair of sex chromosomes (1 alleles from each parrent).

    Each of these chromosomes are numbered according to size from 1 to 22, with the 23rd pair as the sex chromosomes.

    XX from female sex chromosomes and XY from male sex chromosomes.

    Does this mean that each cell has...

    Chromosomes of a particular pair (homologoous), 1 of a pair (of alleles) might contain the gene say hair colour brown version of the gene, and the other (alleles or 1 of a pair) may carry the blond hair allele.

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  • ?
    Lv 4
    4 years ago

    Mitosis will produce an identical daughter cell 46 chromosomes (23 pairs). Only after meiosis are there less because sex cells have 23.

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  • Anonymous
    1 decade ago

    yes i agree with you...

    Each cell has two of every chromosome

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