a.
To determine:
Mutation 1: A transition at
a.
Explanation of Solution
Transition mutation is a type of base-substitution mutation in which either a purine base is replaced with different purine base or pyrimidine base is replaced with different pyrimidine base. Due to transition mutation at nucleotide 11, the DNA template formed is
b.
To determine:
Mutation 2: A transition at nucleotide 13 in a given nucleotide sequence of
b.
Explanation of Solution
In transition mutation, a purine base is replaced by different purine base and pyrimidine base is replaced by different pyrimidine base. The transition at 13 nucleotides of DNA sequence results
c.
To determine:
Mutation 3: A one-nucleotide deletion at nucleotide 7 in a given nucleotide sequence of
c.
Explanation of Solution
In deletion mutation, removal of single nucleotide results in a frameshift mutation that changes the reading frame. After deletion of the nucleotide at 7 positions the DNA sequence formed is
d.
To determine:
Mutation 4: A
d.
Explanation of Solution
In transversion mutation a pyrimidine base is replaced with purine base or purine base is replaced with pyrimidine base. After transversion of
e.
To determine:
Mutation 5: An addition of TGG after nucleotide 6 in a given nucleotide sequence of
e.
Explanation of Solution
Addition of nucleotide in a DNA sequence results in a change in codon sequence that codes for different protein. On addition of TCG after 6 nucleotide DNA sequence is
f.
To determine:
Mutation 6: A transition at nucleotide 9 in a given nucleotide sequence of
f.
Explanation of Solution
Transition mutation involves the replacement of a purine with purine or pyrimidine with a pyrimidine. In this transition at nucleotide 9 forms, the DNA sequence is
The mutation causes the change of sequence of nucleotide (one base) in a gene or a chromosome. A change in nucleotide at 11 position results in the coding of amino acid serine. Mutation at nucleotide 13 results in a stop codon. Deletion of the nucleotide at 7 results in the coding of alanine. Transversion of
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Chapter 18 Solutions
Genetics: A Conceptual Approach
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