Multiple Choice
Which of the following mutations would likely be most dangerous to a cell?
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15. Gene Expression
Mutations
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Which of the following are ways that mutations may alter a gene?
A
By changing the nucleotide sequence
B
By altering the gene's location on the chromosome
C
By increasing the number of chromosomes
D
By converting DNA into RNA
Verified step by step guidance1
Understand that a mutation is a change in the DNA sequence of a gene. This can occur in several ways, affecting the gene's function or expression.
Consider how changing the nucleotide sequence can alter a gene. Mutations such as substitutions, insertions, or deletions can change the sequence of nucleotides in DNA, potentially altering the protein that is produced.
Evaluate the possibility of altering the gene's location on the chromosome. This can occur through chromosomal rearrangements, such as translocations, which can affect gene expression by placing the gene in a different regulatory environment.
Examine how increasing the number of chromosomes can affect genes. This is known as polyploidy and can lead to an increase in gene dosage, potentially affecting the organism's phenotype.
Understand the process of converting DNA into RNA, known as transcription. While this is a normal cellular process, mutations can affect the regulation of transcription, leading to changes in gene expression.
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