Variation and Mutation - GCSE Biology (9-1)

This video is for Edexcel IGCSE Biology 9-1 but is relevant for many GCSE Biology courses. It covers these specific objectives from the syllabus 3.33 Understand that variation within a species can be genetic, environmental, or a combination of both. 3.34 Understand that mutation is a rare, random change in genetic material that can be inherited. 3.35B Understand how a change in DNA can affect the phenotype by altering the sequence of amino acids in a protein. 3.36B Understand how most genetic mutations have no effect on the phenotype, some have a small effect and rarely do they have a significant effect. 3.37B Understand that the incidence of mutations can be increased by exposure to ionising radiation (for example, gamma rays, x-rays and ultraviolet rays) and some chemical mutagens (for example, chemicals in tobacco). You can download a teaching PowerPoint for this topic here: www.mrexham.com/3-reproduction-and-inheritance.htm… Or one for the whole course here: www.mrexham.com/store/p118/Ultimate_IGCSE_Presenta… I also have a TES Shop here: www.tes.com/teaching-resources/shop/mrexham

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