Question

which best describes a centromere?
sister chromosomes that are held together by a chromatid
paired chromosomes that have genes arranged in the same order
the part of a chromosome that joins the sister chromatids
the material that makes up a chromosome

Explanation:

• A centromere is a constricted region of a chromosome.
• It is the part that joins sister chromatids.
• Sister chromatids are two identical copies of a single replicated chromosome.
• The centromere is crucial for proper chromosome segregation during cell division.

Answer:

the part of a chromosome that joins the sister chromatids