Multiple Choice
Which of the following statements about gene mutations is true?
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15. Gene Expression
Mutations
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When do chromosomal mutations usually occur?
A
During DNA replication
B
During translation
C
During meiosis
D
During transcription
Verified step by step guidance1
Understand that chromosomal mutations refer to changes in the structure or number of chromosomes, which can lead to genetic disorders or variation.
Recognize that meiosis is a type of cell division that reduces the chromosome number by half, creating four haploid cells, each genetically distinct from the parent cell.
During meiosis, homologous chromosomes pair up and exchange segments in a process called crossing over, which can lead to chromosomal mutations if errors occur.
Chromosomal mutations can also occur during the separation of chromosomes in meiosis, known as nondisjunction, where chromosomes fail to separate properly, leading to an abnormal number of chromosomes.
Therefore, chromosomal mutations are most likely to occur during meiosis due to the complex processes of crossing over and chromosome segregation.
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