NEET BIOLOGY

Detailed explanation-1: -The first and longest phase of mitosis is prophase. During prophase, chromatin condenses into chromosomes, and the nuclear envelope (the membrane surrounding the nucleus) breaks down. In animal cells, the centrioles near the nucleus begin to separate and move to opposite poles of the cell.

Detailed explanation-2: -Interphase is the longest part of the cell cycle. This is when the cell grows and copies its DNA before moving into mitosis. During mitosis, chromosomes will align, separate, and move into new daughter cells. The prefix inter-means between, so interphase takes place between one mitotic (M) phase and the next.

Detailed explanation-3: -The stage of mitosis that takes the most extended amount of time to complete is prophase. Most of the cellular processes and activities take place in this phase. Prophase is also segregated into early and late phases. And for this reason, this stage takes much more time to complete than another stage.

Detailed explanation-4: -Prophase-I takes longest duration in meiosis. Hence it is sub divided into five stages.

Detailed explanation-5: -The longest stage of meiosis is Prophase 1. During prophase I, homologous chromosomes pair and exchange DNA in a process called homologous recombination, which results in chromosomal crossover. It usually lasts upto 90% of the entire time of meiosis phase as genetic assortment takes place during this phase.