Anonymous
Anonymous asked in Science & MathematicsBiology · 1 decade ago

What would happen to the chromosome number in a fertilized egg if meiosis did not occur?

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  • kt
    Lv 7
    1 decade ago
    Favorite Answer

    Meiosis is reduction division, so each gamete has half the normal complement of chromosomes. Therefore, when fertilization occurs, half of the chromosomes come from the mother (in the egg) and half from the father (in the sperm). That gives the zygote the normal number of chromosomes, the same as the adults from which the gametes came.

    If meiosis did not occur, fertilization would cause each cell to have twice the normal number of chromosomes. Then, the next one would have four times as many.... soon there wouldn't be room in the cell for anything else!

    Seriously, some major problems can be caused in humans if meiosis does not occur normally, if even one chromosome does not separate properly. It's called trisomy, and it means the person has three copies of a chromosome instead of the normal two... Downs syndrome is caused by trisomy of chromosome 21.

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  • Anonymous
    4 years ago

    Then the child would have double the number of chormosomes needed, causing it to be a miscarriage or still birth. If this did happen then the number of chromosomes animals had would keep on increasing and increasing until they were unable to sort through the chromosomes correctly leading to lots of mistakes

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  • 1 decade ago

    If a haploid sperm fertilized the egg, the resulting zygote would be triploid. If the sperm cell was also diploid then the resulting zygote would be tetraploid.

    Source(s): Biology instructor for 39 years
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  • 5 years ago

    Homo sapiens would have died a long time ago before they even learned how to make a fire !!

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  • Anonymous
    1 decade ago

    it would double

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