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    1. What sequence of nucleotide pairs in a Drosophila gene will encode the amino acid sequence met-trp-phe-trp-met (reading from the amino terminus to the carboxyl terminus)?

    2. A wild type gene contains the trinucleotide-pair sequence:
    was 5'-GAG-3' changed to:5'-GTG-3'
    3'CTC -5' 3'-CAC-5'
    If the second base pair in this gene segment will change from A-T to T-A, will it still code the glutamic acid?

    3. A single nucleotide addition followed by a single nucleotide deletion approximately 20 bp apart in the DNA causes a change in the protein sequence from

    -His-Thr-Glu-Asp-Trp-Leu-His-Gln-Asp-

    to -His-Asp-Arg-Gly-Leu-Ala-Thr-Ser-Asp-

    Which nucleotide has been added and which deleted? What are the original and the new mRNA sequences?

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    https://brainmass.com/biology/dna-chromosomes-and-genomes/transcription-135893

    Solution Preview

    1. What sequence of nucleotide pairs in a Drosophila gene will encode the amino acid sequence met-trp-phe-trp-met (reading from the amino terminus to the carboxyl terminus)?

    Response:

    All you need to do is look up the codons on the chart and write them down in order, like this:

    met--trp--phe--trp--met
    ATG-TGG-TTT-TGG-ATG

    (If you wanted, you could have had another triplet for phe.

    Therefore, the sequence is:
    ATGTGGTTTTGGATG

    ===============================================

    2. A wild type gene contains the trinucleotide-pair sequence:

    was 5'-GAG-3' changed to:5'-GTG-3'
    3'-CTC-5' 3'-CAC-5'

    If the second base pair in this gene segment will change from A-T to T-A, will it still code the glutamic acid?

    Response:

    All you need to do is ...

    $2.19