AP BIOLOGY

Detailed explanation-1: -Chromatin condenses into chromosomes during cell division.

Detailed explanation-2: -During much of mitosis, DNA is wrapped and condensed into chromosomes (pictured). However, during this phase, DNA is uncondensed, and remains in the nucleus as a mass of chromatin, or a combination of DNA and proteins that the DNA wraps around.

Detailed explanation-3: -Prophase is the first phase of mitosis. During this phase, the chromosomes inside the cell’s nucleus condense and form tight structures. In fact, the chromosomes become so dense that they appear as curvy, dark lines when viewed under a microscope (Figure 1).

Detailed explanation-4: -Chromatin is a complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells. Nuclear DNA does not appear in free linear strands; it is highly condensed and wrapped around nuclear proteins in order to fit inside the nucleus.

Detailed explanation-5: -Chromosomes remain condensed throughout the various stages of mitosis (2-5). Eukaryotes typically possess multiple pairs of linear chromosomes, all of which are contained in the cellular nucleus, and these chromosomes have characteristic and changeable forms.