NEET BIOLOGY

Detailed explanation-1: -Chromatin condensation begins during prophase (2) and chromosomes become visible. Chromosomes remain condensed throughout the various stages of mitosis (2-5).

Detailed explanation-2: -During prophase, the chromosomes condense and the nucleolus disappears. At the beginning of prophase, the chromosomes are condensing to become visible microscopically. Each chromosome consists of two parallelsister chromatids, joined together at one point along their length at thecentromere.

Detailed explanation-3: -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-4: -During prophase I, the complex of DNA and protein known as chromatin condenses to form chromosomes. The pairs of replicated chromosomes are known as sister chromatids, and they remain joined at a central point called the centromere.