Multiple Choice
Which of the following chromosomal mutations results in a situation in which the chromosome number is either 2n+1 or 2n-1?
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6. Chromosomal Variation
Chromosomal Mutations: Aneuploidy
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Which of the following describes a situation in which the chromosome number is either 2n + 1 or 2n - 1?
A
Inversion
B
Translocation
C
Aneuploidy
D
Polyploidy
Verified step by step guidance1
Understand the meaning of the terms related to chromosome number changes: Inversion, Translocation, Aneuploidy, and Polyploidy.
Recall that Inversion refers to a chromosome segment being reversed end to end, which does not change the chromosome number.
Recognize that Translocation involves the rearrangement of parts between nonhomologous chromosomes, but typically does not change the total chromosome number.
Define Aneuploidy as a condition where the chromosome number is not an exact multiple of the haploid number, often resulting in 2n + 1 (trisomy) or 2n - 1 (monosomy).
Understand that Polyploidy refers to having more than two complete sets of chromosomes (e.g., 3n, 4n), which is different from the gain or loss of a single chromosome seen in Aneuploidy.
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