AP BIOLOGY

Detailed explanation-1: -The two rod-like parts that make up a chromosome are called chromatids. The total number of cells in an organism increases as a result of photosynthesis. The formation of a cell plate is a characteristic of cytokinesis in plant and animals cells. Chromatids are held together by centromere.

Detailed explanation-2: -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-3: -A chromosome is a genetic material that has all the features and characteristics of an organism. Derived from Greek, “Chroma” and “Soma” which translates to “color” and “body” respectively. Now, a chromosome is made up of two strands which are identical to each other, and these are called Chromatids.

Detailed explanation-4: -Chromosomes and cell division After DNA replication, each chromosome now consists of two physically attached sister chromatids. After chromosome condensation, the chromosomes condense to form compact structures (still made up of two chromatids).