교과서 질문
A normal chromosome and its homolog carrying a paracentric inversion are shown here. The dot (·) represents the centromere.
Normal ABC • DEFGHIJK
Inversion abc • djihgfe
Diagram the alignment of chromosomes during prophase I.
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6. Chromosomal Variation
Chromosomal Rearrangements: Translocations
Multiple Choice
In chromosomal rearrangements, which type of mutation involves an exchange of segments between two nonhomologous chromosomes?
A
Reciprocal translocation
B
Paracentric inversion
C
Nondisjunction
D
Deletion
검증된 단계별 안내1
Understand the types of chromosomal mutations: deletions remove a segment, inversions flip a segment within the same chromosome, nondisjunction involves failure of chromosome separation, and translocations involve movement of segments between chromosomes.
Recall that a reciprocal translocation specifically refers to the exchange of segments between two nonhomologous chromosomes, meaning chromosomes that are not a matching pair.
Identify that paracentric inversion involves a segment inversion within one chromosome and does not involve exchange between chromosomes.
Recognize that nondisjunction is related to chromosome number errors during cell division, not segment exchange.
Conclude that the mutation type involving exchange of segments between two nonhomologous chromosomes is reciprocal translocation.
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