[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-208073-en":3,"doc-seo-208073-105":30,"detail-sidebar-cat-0-en-105":90},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},208073,1099523882182,"Alex Sinclair","https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8",4,"Exam","Edexcel GCSE Biology - 2.1 Cell Division - 2.1.1 Mitosis","Revision notes for Edexcel GCSE Biology on cell division within the cell cycle, focusing on mitosis. Mitosis is explained as nuclear division producing two genetically identical diploid daughter cells, including the roles of mitosis in growth, repair, and asexual reproduction. The document outlines interphase and the stages of mitosis—prophase, metaphase, anaphase, and telophase—plus cytokinesis and a worked revision tip on calculating cell numbers after repeated divisions.","Head to www.savemyexams. com for more awesome resources  \n Edexcel GCSE Biology: Combined Science  \n2 .1 Cell Division  \nContents  \n 2.1.1 Mitosis  \n 2.1.2 Uncontrolled Cell Division  \nPage 1 of 6  \n© 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nYour notes  \nHead to www.savemyexams. com for more awesome resources  \n2.1.1 Mitosis  \nMitosis  \n Mitosis is a nuclear division that gives rise to two genetically identical diploid daughter cells  \n In a human, this diploid number is 23 pairs of chromosomes  \n All body cells (and not gametes) are produced by mitosis of the zygote  \n Mitosis is required for:  \n Growth: mitosis produces new cells  \n Repair: to replace damaged or dead cells  \n Asexual reproduction: mitosis produces oyspring that are genetically identical to the parent  \nThe Cell Cycle  \n There are 3 parts of the cell cycle  \n Interphase-Just before mitosis, the DNA in the nucleus copies itself exactly (forms x-shaped chromosomes)  \n Mitosis-Chromosomes line up along the centre of the cell where cell |bres pull them apart  \n Cytokinesis-The cell cytoplasm and membrane divides to produce two daughter cells; each new cell hasa copy of each of the chromosomes  \nPage 2 of 6  \n© 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nYour notes  \nHead to www.savemyexams. com for more awesome resources  \nThe three stagesofthe cell cycle  \nThe Stages of Mitosis  \n The process of mitosis is itself made up of a series of stages that begin after interphase has occurred. These stages occur in the following order:  \n Prophase-DNA condenses, chromosomes become visible and the nuclear membrane breaks down  \n Metaphase-Chromosomes line up on the equator of the cell (the metaphase plate)  \n Anaphase-Spindle |bres (also known as cell |bres) split the chromosomes down the centre and pull one chromatid to either side of the cell  \n Telophase-New membranes form around the chromosomes at either end of the cell  \nPage 3 of 6  \n© 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nYour notes  \nHead to www.savemyexams. com for more awesome resources  \nThe stages of mitosis  \nPage 4 of 6  \n© 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nYour notes  \nHead to www.savemyexams. com for more awesome resources  \n Examiner Tip  \nSometimes you will be asked to calculate the number of cells that would result from a certain number of divisions. In order to work this out, you need to calculate 2 to the power of the number of divisions (2n) . For example, if we started with 1 cell and it divided 7 times, we would end up with 27 cells, which is 128 cells.  \nPage 5 of 6  \n© 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nYour notes  \nHead to www.savemyexams. com for more awesome resources  \n2.1.2 Uncontrolled Cell Division  \nUncontrolled Cell Division  \n Cells in the body divide by mitosis to produce more cells-this is essential for growth and to repair damaged cells  \n For example, the cells of the intestines are constantly dividing to replace those that are shed as food moves through the digestive system  \n Mitosis is just one part of the cell cycle which is regulated by many diyerent genes to ensure that cells divide only when they need to and stop when required  \n Cancer is caused as a result of mutations in the DNA of cells that lead to uncontrolled cell growth and division-this can result in the formation of a tumour (a mass of cells)  \n Usually, tumours form as a result of loss of control of the cell cycle  \nTypes of Tumour  \n There are two main types of tumour:  \n Benign tumours  \n Malignant tumours  \n Benign tumours are growths of abnormal cells which are contained in one area, usually within a membrane  \n Crucially, benign tumours do not invade other parts of the body  \n This means these tumours are not considered cancerous  \n Malignant tumours are cancerous – the cells of these tumours invade ne","cbCaiiKNKKBeuxu2","https://ap.wps.com/l/cbCaiiKNKKBeuxu2","pdf",596962,1,6,"English","en",105,"# 2.1 Cell Division\n## 2.1.1 Mitosis\n## 2.1.2 Uncontrolled Cell Division","[{\"question\":\"What is mitosis and what does it produce?\",\"answer\":\"Mitosis is a nuclear division that produces two genetically identical diploid daughter cells. In humans, the diploid chromosome number is 23 pairs.\"},{\"question\":\"What are the main stages of mitosis?\",\"answer\":\"The stages are prophase, metaphase, anaphase, and telophase. DNA condenses, chromosomes align at the equator, chromatids are pulled apart, and new membranes form around the chromosomes.\"},{\"question\":\"How can you calculate the number of cells after repeated divisions?\",\"answer\":\"Use 2 to the power of the number of divisions (2n). For example, starting with 1 cell and dividing 7 times gives 27 cells, which is 128.\"}]","Edexcel GCSE Biology - 2.1 Cell Division - 2.1.1 Mitosis | PDF",1788602343,15,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":85,"head_meta":87,"extra_data":89,"updated_unix":28},"edexcel-gcse-biology-21-cell-division-211-mitosis","",{"@graph":36,"@context":84},[37,53,67],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/exam/",3,{"item":52,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/edexcel-gcse-biology-21-cell-division-211-mitosis/208073/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":61,"encodingFormat":60,"isAccessibleForFree":62,"interactionStatistic":63},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":64,"interactionType":65,"userInteractionCount":4},"InteractionCounter",{"@type":66},"ViewAction",{"@type":68,"mainEntity":69},"FAQPage",[70,76,80],{"name":71,"@type":72,"acceptedAnswer":73},"What is mitosis and what does it produce?","Question",{"text":74,"@type":75},"Mitosis is a nuclear division that produces two genetically identical diploid daughter cells. In humans, the diploid chromosome number is 23 pairs.","Answer",{"name":77,"@type":72,"acceptedAnswer":78},"What are the main stages of mitosis?",{"text":79,"@type":75},"The stages are prophase, metaphase, anaphase, and telophase. DNA condenses, chromosomes align at the equator, chromatids are pulled apart, and new membranes form around the chromosomes.",{"name":81,"@type":72,"acceptedAnswer":82},"How can you calculate the number of cells after repeated divisions?",{"text":83,"@type":75},"Use 2 to the power of the number of divisions (2n). 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