A protein disk that attaches two chromatids to each other in a chromosome is called a?

The protein disk that attaches two chromatids to each other in a chromosome is called a centromere. The centromere is a specialized DNA sequence that serves as the attachment point for the spindle fibers during cell division. It is located at a specific position on each chromosome and ensures that the chromatids are separated accurately into the two daughter cells during mitosis and meiosis.