Is there a punnett square to determine down syndrome?

4 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    The answer is no. Down syndrome is due to an extra chromosome 21. It is due to a sporadic error of meiosis. Punnett squares are used to predict phenotypes based on known alleles (traits) carried by the parents. In other words, you use the squares predicting the percentage of offspring who will have dominant versus recessive traits. Down syndrome is not dominant or recessive. It is not due to one trait. It is due to a whole extra chromosome that contains hundreds of genes.

  • Smom
    Lv 4
    1 decade ago

    Most instances of Down syndrome are not inherited...it tends to be a random genetic anomaly.

  • Karen
    Lv 4
    4 years ago

    i know if you get bit by the Tse Tse fly when you are small you can also contract downs.

  • 1 decade ago

    Yes, there is.

    This site should help you!

    http://www.ygyh.org/ds/whatisit.htm

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