How can a zygote receive an abnormal chromosome number?

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How can a zygote receive an abnormal chromosome number?

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Thái Dương 5 years 2021-07-18T06:57:45+00:00 1 Answers 23 views 0

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  1. thienthi
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    2021-07-18T06:58:49+00:00
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    Explanation:

    Some chromosomal conditions are caused by changes in the number of chromosomes. These changes are not inherited, but occur as random events during the formation of reproductive cells (eggs and sperm). An error in cell division called nondisjunction results in reproductive cells with an abnormal number of chromosomes

    Chromosome abnormalities often happen due to one or more of these: Errors during dividing of sex cells (meiosis) Errors during dividing of other cells (mitosis) Exposure to substances that cause birth defects (teratogens)

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