A chromosome has an inversion. Which of the following describes a pericentric inversion?

• A. An inversion that results in a duplication of genetic material
• B. An inversion that occurs outside the centromere
• C. An inversion that includes the centromere
• D. An inversion that affects only one arm of the chromosome

Answer: (C)

Verified step by step guidance

1. Understand that a chromosome inversion is a type of mutation where a segment of a chromosome is reversed end to end.
2. Recognize that there are two main types of inversions: pericentric and paracentric.
3. A pericentric inversion includes the centromere within the inverted region, while a paracentric inversion does not include the centromere.
4. In the context of the problem, identify that the correct description of a pericentric inversion is 'An inversion that includes the centromere'.
5. Review the options given and match the correct description to the definition of a pericentric inversion.