NEET BIOLOGY

Detailed explanation-1: -During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes.

Detailed explanation-2: -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-3: -During prophase II, the chromosomes condense, and a new set of spindle fibers forms. The chromosomes begin moving toward the equator of the cell. During metaphase II, the centromeres of the paired chromatids align along the equatorial plate in both cells.

Detailed explanation-4: -In Meiosis 1, chromatin condenses to chromosomes, they pair up(prophase 1), they align in line(metaphase 1), each chromosome from a pair is separated and transported to opposite poles( during anaphase 1), then chromosomes decondense and nuclear envelope surrounds them(telophase 1), which disappeared in prophase 1.

Detailed explanation-5: -Prophase I is divided into five phases: leptotene, zygotene, pachytene, diplotene, and diakinesis.