Question

when a chromosome segment breaks from the chromosome, reverses its orientation, and then reattaches in the original position.

duplication

nondisjunction

inversion

translocation

Explanation:

To solve this, we analyze each option:

• Duplication: Involves copying a chromosome segment, not reversing orientation.
• Nondisjunction: Is the failure of chromosomes to separate during cell division, unrelated to segment reversal.
• Inversion: Matches the description— a chromosome segment breaks, reverses orientation, and reattaches.
• Translocation: Involves moving a segment to a non - homologous chromosome, not reattaching in the original position.

Answer:

C. inversion