Homework Help is Here – Start Your Trial Now!
Science
Biology
2. A reversion is a mutation that returns a mutant codon back to a codon that gives a wild-type phenotype. At the DNA level, this type of mutation can be an exact reversion or an equivalent reversion. GAG First GTG Exact GAG (glutamic acid) mutation (valine) reversion (glutamic acid) GAG - GTG First Equivalent (valine) reversion GAA (glutamic acid) mutation (glutamic acid) GAG First GTG Equivalent - GAT (glutamic acid) mutation (valine) reversion (aspartic acid) An equivalent reversion produces a protein that is equivalent to the wild type in structure and function. This can occur in two ways. In some cases, the reversion produces the wild-type amino acid (in this case, glutamic acid), but it uses a different codon than the wild-type gene. Alternatively. an equivalent reversion may substitute an amino acid structurally similar to the wild-type amino acid. In our example, an equivalent reversion has changed valine to an aspartic acid. Because aspartic and glutamic acids are structurally similar-they are acidic amino acids-this type of reversion can restore wild-type structure and function. Now here is the question. The template strand within the coding sequence of a gene has the following sequence: 3'-TACCCCTTCGACCCCGGA-5' This template produces the following mRNA: 5'-AUGGGGAAGCUGGGGCCA–3' The MRNA encodes a polypeptide with the following sequence: methionine-glycine-lysine–leucine-glycine-proline. A mutation changes the template strand to this sequence: 3'-TACCCCTACGACCCCGGA-5' After the first mutation, another mutation occurs to change this sequence again. Is each of the following second mutations an exact reversion, an equivalent reversion, or neither? 3'-TACCCCTCCGACCCCGGA-5' 3'-TACCCCTTCGACCCCGGA-5' 3'-TACCCCGACGACCCCGGA-5'

2. A reversion is a mutation that returns a mutant codon back to a codon that gives a wild-type phenotype. At the DNA level, this type of mutation can be an exact reversion or an equivalent reversion. GAG First GTG Exact GAG (glutamic acid) mutation (valine) reversion (glutamic acid) GAG - GTG First Equivalent (valine) reversion GAA (glutamic acid) mutation (glutamic acid) GAG First GTG Equivalent - GAT (glutamic acid) mutation (valine) reversion (aspartic acid) An equivalent reversion produces a protein that is equivalent to the wild type in structure and function. This can occur in two ways. In some cases, the reversion produces the wild-type amino acid (in this case, glutamic acid), but it uses a different codon than the wild-type gene. Alternatively. an equivalent reversion may substitute an amino acid structurally similar to the wild-type amino acid. In our example, an equivalent reversion has changed valine to an aspartic acid. Because aspartic and glutamic acids are structurally similar-they are acidic amino acids-this type of reversion can restore wild-type structure and function. Now here is the question. The template strand within the coding sequence of a gene has the following sequence: 3'-TACCCCTTCGACCCCGGA-5' This template produces the following mRNA: 5'-AUGGGGAAGCUGGGGCCA–3' The MRNA encodes a polypeptide with the following sequence: methionine-glycine-lysine–leucine-glycine-proline. A mutation changes the template strand to this sequence: 3'-TACCCCTACGACCCCGGA-5' After the first mutation, another mutation occurs to change this sequence again. Is each of the following second mutations an exact reversion, an equivalent reversion, or neither? 3'-TACCCCTCCGACCCCGGA-5' 3'-TACCCCTTCGACCCCGGA-5' 3'-TACCCCGACGACCCCGGA-5'

Biology Today and Tomorrow without Physiology (MindTap Course List)
Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter10: Biotechnology
Section: Chapter Questions
Problem 3DID
See similar textbooks
icon
Related questions
Question
2. A reversion is a mutation that returns a mutant codon back to a codon that gives a wild-type phenotype. At the DNA level, this type of mutation can be an exact reversion or an equivalent reversion. GAG First GTG Exact GAG (glutamic acid) mutation (valine) reversion (glutamic acid) GAG - GTG First Equivalent (valine) reversion GAA (glutamic acid) mutation (glutamic acid) GAG First GTG Equivalent - GAT (glutamic acid) mutation (valine) reversion (aspartic acid) An equivalent reversion produces a protein that is equivalent to the wild type in structure and function. This can occur in two ways. In some cases, the reversion produces the wild-type amino acid (in this case, glutamic acid), but it uses a different codon than the wild-type gene. Alternatively. an equivalent reversion may substitute an amino acid structurally similar to the wild-type amino acid. In our example, an equivalent reversion has changed valine to an aspartic acid. Because aspartic and glutamic acids are structurally similar-they are acidic amino acids-this type of reversion can restore wild-type structure and function. Now here is the question. The template strand within the coding sequence of a gene has the following sequence: 3'-TACCCCTTCGACCCCGGA-5' This template produces the following mRNA: 5'-AUGGGGAAGCUGGGGCCA–3' The MRNA encodes a polypeptide with the following sequence: methionine-glycine-lysine–leucine-glycine-proline. A mutation changes the template strand to this sequence: 3'-TACCCCTACGACCCCGGA-5'
Transcribed Image Text:2. A reversion is a mutation that returns a mutant codon back to a codon that gives a wild-type phenotype. At the DNA level, this type of mutation can be an exact reversion or an equivalent reversion. GAG First GTG Exact GAG (glutamic acid) mutation (valine) reversion (glutamic acid) GAG - GTG First Equivalent (valine) reversion GAA (glutamic acid) mutation (glutamic acid) GAG First GTG Equivalent - GAT (glutamic acid) mutation (valine) reversion (aspartic acid) An equivalent reversion produces a protein that is equivalent to the wild type in structure and function. This can occur in two ways. In some cases, the reversion produces the wild-type amino acid (in this case, glutamic acid), but it uses a different codon than the wild-type gene. Alternatively. an equivalent reversion may substitute an amino acid structurally similar to the wild-type amino acid. In our example, an equivalent reversion has changed valine to an aspartic acid. Because aspartic and glutamic acids are structurally similar-they are acidic amino acids-this type of reversion can restore wild-type structure and function. Now here is the question. The template strand within the coding sequence of a gene has the following sequence: 3'-TACCCCTTCGACCCCGGA-5' This template produces the following mRNA: 5'-AUGGGGAAGCUGGGGCCA–3' The MRNA encodes a polypeptide with the following sequence: methionine-glycine-lysine–leucine-glycine-proline. A mutation changes the template strand to this sequence: 3'-TACCCCTACGACCCCGGA-5'
After the first mutation, another mutation occurs to change this sequence again. Is each of the following second mutations an exact reversion, an equivalent reversion, or neither? 3'-TACCCCTCCGACCCCGGA-5' 3'-TACCCCTTCGACCCCGGA-5' 3'-TACCCCGACGACCCCGGA-5'
Transcribed Image Text:After the first mutation, another mutation occurs to change this sequence again. Is each of the following second mutations an exact reversion, an equivalent reversion, or neither? 3'-TACCCCTCCGACCCCGGA-5' 3'-TACCCCTTCGACCCCGGA-5' 3'-TACCCCGACGACCCCGGA-5'
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Biology Today and Tomorrow without Physiology (Mi…
Biology Today and Tomorrow without Physiology (Mi…
Biology
ISBN:
9781305117396
Author:
Cecie Starr, Christine Evers, Lisa Starr
Publisher:
Cengage Learning
Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:
9781305389892
Author:
Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:
Cengage Learning
Biology (MindTap Course List)
Biology (MindTap Course List)
Biology
ISBN:
9781337392938
Author:
Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:
Cengage Learning
Human Heredity: Principles and Issues (MindTap Co…
Human Heredity: Principles and Issues (MindTap Co…
Biology
ISBN:
9781305251052
Author:
Michael Cummings
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS