Biology

The correct answer is: A.Centromere

During metaphase, the spindle fibers attach to the centromere of each chromosome. The centromere is the region of the chromosome that holds the two sister chromatids together. Specifically, the spindle fibers connect to the kinetochore, a protein complex located at the centromere, to help align the chromosomes along the metaphase plate.

Here’s why the other options are incorrect:

B.Chromatid: The chromatids are the individual strands of a duplicated chromosome, and while they are involved in mitosis, the spindle fibers ...