--- title: "Differentiation and Stem Cells" description: "Differentiation changes gene activity as cells become specialised. Compares embryonic and adult stem-cell potential, explains how plant meristems supply cells, and distinguishes medical uses from obje" canonical: https://lightmysky.com/learn/science/differentiation-and-stem-cells-mt_UmLJgmcCjO source: https://lightmysky.com/learn/science/differentiation-and-stem-cells-mt_UmLJgmcCjO.md retrieved: 2026-11-12 --- > **Agent view.** This is the Markdown twin of the page, for tools and assistants. > When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md > API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md > Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt > Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json > Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`. # Differentiation and Stem Cells Differentiation changes gene activity as cells become specialised. Compares embryonic and adult stem-cell potential, explains how plant meristems supply cells, and distinguishes medical uses from objections to embryo destruction. Subject: Science · Area: Organisms & Life Processes · Ages 14 to 16 Page: https://lightmysky.com/learn/science/differentiation-and-stem-cells-mt_UmLJgmcCjO ## Ready when they can - Explains how changes in gene expression produce specialised cells, while most body cells with a nucleus retain the same set of genes. - Compares what embryonic and adult stem cells can turn into. - Gives one medical use of stem cells and explains one objection to destroying embryos to obtain embryonic stem cells. ## Lesson: Same genes, different jobs You have met stem cells and mitosis. Mitosis supplies new cells; differentiation gives cells specialised structures and functions. Most body cells with a nucleus carry the same genes. During differentiation, changes in gene activity affect which proteins a cell makes. Unused genes are usually kept. Mature human red blood cells lose their nucleus and do not retain the full gene set, so the rule does not cover every cell. **Example.** Transcription is copying information from a gene's DNA into RNA. This is part of gene expression, the use of a gene's instructions. Transcription factors are proteins that bind to regulatory DNA and can increase or decrease transcription. Muscle and nerve cells use different combinations of genes and make different proteins for their jobs. They also use many genes in common. *(drawing: Muscle and nerve cells can carry the same genes. Different gene activity helps them make different proteins and perform different jobs.)* Stem cells can self-renew, producing more stem cells, and give rise to specialised cells. Embryonic stem cells are pluripotent: they can form almost any body cell type. Adult stem cells usually have a narrower range. Multipotent stem cells can form several related types. Blood-forming stem cells in bone marrow can produce different blood cell types. Related cell types need not remain next to their source. Transplants of blood-forming stem cells from bone marrow are used to treat some blood diseases. The cells help restore blood-cell production. Researchers also study embryonic stem cells for tissue repair; a research aim is not proof of a safe, effective treatment. Obtaining embryonic stem cells can destroy an early embryo. Some people object because they believe embryos deserve protection. This concern is about embryo collection, not adult bone-marrow collection. Meristems are plant regions containing unspecialised or partly specialised cells. Cells there can divide. Some descendants become specialised plant tissues while other cells maintain the meristem. Root and shoot tips support growth in length; other meristems support growth in thickness. Both meristems and animal adult stem cells can supply new cells. This does not mean every stem cell divides all the time. **Recap.** Differentiation changes gene activity and cell function. Stem cells can self-renew and produce specialised cells. Their possible cell types depend on the kind of stem cell. *Lesson, questions and flashcards written for this dataset.* ## Practice 8 questions on this page, each with its working shown. ## Needs first - [The Cell Cycle and Mitosis](https://lightmysky.com/learn/science/the-cell-cycle-and-mitosis-mt_gllZOZEzW7) - [Cancer & Stem Cells](https://lightmysky.com/learn/science/cancer-and-stem-cells-mt_roinupb_7L) ## Opens up - [Cloning: Cuttings, Tissue Culture and Adult Cell Cloning](https://lightmysky.com/learn/science/cloning-cuttings-tissue-culture-and-adult-cell-cloning-mt_3NaPCGrZTg) - [Enhancers, accessibility and combinatorial control](https://lightmysky.com/learn/science/enhancers-accessibility-and-combinatorial-control-mt_BTMCj6V6jD) - [Tissue Types and How a Body Is Organised](https://lightmysky.com/learn/science/tissue-types-and-how-a-body-is-organised-mt_dQ-glI4kdz) - [Transcription Factors and Epigenetic Control](https://lightmysky.com/learn/science/transcription-factors-and-epigenetic-control-mt_nF4JJ_EDa4)