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    'Flavr Savr' tomatoes are tomatoes that have been genetically modified so they take longer than normal to ripen. Genetic engineers have achieved this delay in ripening by disabling a critical tomato gene so it fails to produce a gene needed for ripening.

    To disable the gene, a start codon is inserted at the beginning of the nonsense strand so both sense strand and nonsense strand get copied into mRNA.
    Explain why this prevents a polypeptide from being produced.
    Any ideas will be appreciated, thank you!
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    (Original post by algebrax1)
    'Flavr Savr' tomatoes are tomatoes that have been genetically modified so they take longer than normal to ripen. Genetic engineers have achieved this delay in ripening by disabling a critical tomato gene so it fails to produce a gene needed for ripening.

    To disable the gene, a start codon is inserted at the beginning of the nonsense strand so both sense strand and nonsense strand get copied into mRNA.
    Explain why this prevents a polypeptide from being produced.
    Any ideas will be appreciated, thank you!
    Well the whole point of mRNA is that it is single stranded and therefore allows tRNA molecules to bind at the codons therefore allowing translation (formation of a polypeptide) to take place. If you have sense and anti-sense strands (it's not called a nonsense strand btw, nonsense is a type of mutation ) being coded into mRNA, then the 2 mRNA molecules are going to be complementary and so will form a double helix just like DNA. So tRNA can't bind and therefore polypeptides cannot form.

    I hope that makes sense
 
 
 
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