Mitosis Analogy BY CAITLYN CHAN A high school

Mitosis Analogy BY CAITLYN CHAN

A high school gym class = MITOSIS

Interphase, analogy � The girls and boys both go into their separate change rooms to get changed for PE, it takes them a long time to get changed. This is normal part of their PE routine for everyone.

Interphase � The first ‘phase’ of the cell cycle is the interphase. � The interphase is the longest cell stage, and carries out normal functions and grows. � Longest cell stage: takes a long time in change room

Prophase, analogy � Once they are finished getting changed, the whole class comes inside the gym and hangs around the gym, waiting for the teacher to start the lesson. Everyone is talking to one friend.

Prophase � The prophase is the first phase of mitosis. � Nucleus disappears, and spindle fibres form � The spindle fibres perfectly align/attach to the centromere of the chromosomes � In the diagram, the chromatids (chromosomes) are in an X shape. � Centromere is in the middle of the chromosomes and holds them together, until ripped apart. � Prophase, first phase: first time you enter the gym

Metaphase, analogy � The teacher comes into the gym and tells all her students to line up in the centre of the gym, so that the teacher can explain the game and also pick teams. All the friend pairs stick together so hopefully they can be put on the same team.

Metaphase � The Metaphase is the second stage of mitosis. � Chromosomes align in the center/equator of the cell.

Anaphase, analogy � All the friend pairs get separated and put on to different teams with new people. Everyone on both of the teams, mingles with their new team and creates strategies together. This Photo by Unknown Author is licensed under CC BY-NC

Anaphase � 1. The spindle fibres pull on the sister chromatids and they break at the centromere. (Sister pairs get separated) � 2. The spindle fibres on each side pull the separated sister chromatids to opposite ends of the cell. � The anaphase is the third stage of mitosis

Telophase, analogy � The two separate teams go to opposite sides of the gym and get ready to play the game.

Telophase � Telophase is the final stage of miosis � Spindle fibres disappear � Nuclear membrane forms around each separated set of chromosomes. � Separated chromosomes on opposite sides. � Telophase is the last stage of mitosis.

Cytokinesis, analogy � Later, the winning team is very proud of themselves! All the new friends on the winning team talk to each other about their win. The losing team all talk to each other about what they can improve on. In the end, every friend that was separated finds a new friend. The winning team eats lunch together, and the losing team eats lunch together in a different place.

Cytokinesis � Cytokinesis is the stage right after mitosis � cytoplasm of a single eukaryotic cell divides into two daughter cells. (separation of the nuclei into two daughter cells) � The separation of the cytoplasm wants to form two new daughter cells. � Cytokinesis is not part of mitosis, but part of the cell cycle. � Cyokinesis: last of the cell cycle: students leave gym, last part of the gym block.

Whenever you think of the cell cycle and mitosis, think of your PE block, start to finish.