(Definition of âposteriorlyâ from the Cambridge Advanced Learner's Dictionary & Thesaurus Â© Cambridge University Press) Translations of âposteriorlyâ in Chinese (Simplified)
In this diagram of a duplicated chromosome, (2) identifies the centromereâthe region that joins the two sister chromatids, or each half of the chromosome.he centromere (centro- + -mere) is the part of a chromosome that links sister chromatids. During mitosis, spindle fibers attach to the centromere via the kinetochore. Centromeres were first defined as genetic loci that direhromosomes.
  During the S phase (synthesis), chromosomes duplicate and can be called sister chromatids. Sister chromatids are exact copies of each other joined together by a centromere. As long as they are joined, they are called sister chromatids and when they are seperated, they are called chromosomes.