Use the universal genetic code, wherever applicable, to determine amino acid sequence.
ATG CTA GAG GTG TAA
A. Translate the DNA sequence to make a protein.
B. Show the effect of an insertion, deletion, and substitution on the sequence of DNA provided.
C. Which of the above mutations will result in a shift in the reading frame?
D. What type of substitution mutation (missense, silent, and non-sense) was introduced in your sequence?
Use the universal genetic code, wherever applicable, to determine amino acid sequence.
ATG CTA GAG GTG TAA
A. Translate the DNA sequence to make a protein.
B. Show the effect of an insertion, deletion, and substitution on the sequence of DNA provided.
C. Which of the above mutations will result in a shift in the reading frame?
D. What type of substitution mutation (missense, silent, and non-sense) was introduced in your sequence?
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Part B
Think about the DNA coding sequence of a gene. If an A were swapped for a T, what kind of mutation could it cause and why?
a) It could cause a frameshift nonsense or frameshift missense mutation because it would change the reading frame of the codon triplet. | ||||||||||||||||||||||||||||
b) It could cause a silent, missense, or nonsense mutation because those are the types that can be caused by a nucleotide-pair substitution like this one. | ||||||||||||||||||||||||||||
c) It could cause a nonsense mutation because the sequence would no longer be the same, so the protein would be shorter and non-functional. | ||||||||||||||||||||||||||||
d) It could cause a silent mutation because A and T are complementary to each other so it is not really a substitution mutation. Part C Why is a frameshift missense mutation more likely to have a severe effect on phenotype than a nucleotide-pair substitution missense mutation in the same protein?
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