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Question
A normal chromosome and a rearranged chromosome is shown by the diagram. Which of the following describes this rearrangement?
A normal chromosome and a rearranged chromosome is shown by the diagram. Which of the following describes this rearrangement?
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Solution
The correct option is D Inversion
- When a normal chromosome is rearranged in which a segment of a chromosome is reversed end to end is called an inversion. An inversion occurs when a single chromosome undergoes breakage and rearrangement within itself. Inversions are of two types: paracentric and pericentric.
- In deletion mutation, the number of nucleotides can be deleted, from a single base to an entire piece of chromosome.
- Duplication is the major mechanism through which new genetic material is generated during molecular evolution.
- Non-disjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division.
- Chromosome translocation is a chromosome abnormality caused by the rearrangement of parts between nonhomologous chromosomes.
Thus, the correct answer is option D.
- When a normal chromosome is rearranged in which a segment of a chromosome is reversed end to end is called an inversion. An inversion occurs when a single chromosome undergoes breakage and rearrangement within itself. Inversions are of two types: paracentric and pericentric.
- In deletion mutation, the number of nucleotides can be deleted, from a single base to an entire piece of chromosome.
- Duplication is the major mechanism through which new genetic material is generated during molecular evolution.
- Non-disjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division.
- Chromosome translocation is a chromosome abnormality caused by the rearrangement of parts between nonhomologous chromosomes.
Thus, the correct answer is option D.
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