AP BIOLOGY

Detailed explanation-1: -A chromatid is one of the two identical halves of a chromosome that has been replicated in preparation for cell division. The two “sister” chromatids are joined at a constricted region of the chromosome called the centromere.

Detailed explanation-2: -Each chromosome has two short arms called p arms and two long arms called q arms. These arms are held together at the center by the centromere. The tips of the chromosome are capped by sections of DNA called telomeres. Telomeres protect chromosomes during DNA replication.

Detailed explanation-3: -Definition. The two individual chromosomes attached together at centromere in a newly replicated chromosome are known as chromatids. They are clearly visible as two diagonal arms of a typical X-shaped chromosome in metaphase.

Detailed explanation-4: -As long as the sister chromatids are connected at the centromere, they are still considered to be one chromosome. However, as soon as they are pulled apart during cell division, each is considered a separate chromosome.

Detailed explanation-5: -A chromosome is a thread-like structure that is composed of DNA and protein. It carries all the genetic materials of an organism. This is passed from parent to offspring. Chromatid is one of the halves of a chromosome. A chromosome contains only one chromatid.