Multiple Choice
Which type of mutation results in the substitution of a single nucleotide that changes a codon to one that encodes a different amino acid?
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17. Mutation, Repair, and Recombination
Types of Mutations
Multiple Choice
Which type of mutation produces a change in a single gene?
A
Epigenetic modification (e.g., DNA methylation)
B
Gene mutation (point mutation)
C
Chromosomal mutation (structural rearrangement)
D
Genome mutation (change in ploidy)
Verified step by step guidance1
Understand the different types of mutations: Epigenetic modifications affect gene expression without changing the DNA sequence; chromosomal mutations involve large structural changes in chromosomes; genome mutations involve changes in the number of chromosomes (ploidy).
Recognize that a mutation producing a change in a single gene specifically alters the DNA sequence within that gene.
Recall that gene mutations, such as point mutations, involve changes to one or a few nucleotides in the DNA sequence of a gene.
Differentiate gene mutations from chromosomal mutations, which affect larger segments or entire chromosomes, and from genome mutations, which affect the whole set of chromosomes.
Conclude that the mutation type causing a change in a single gene is a gene mutation, often referred to as a point mutation.
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