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4:50
YouTube
Mr Exham Biology
Alleles, phenotype and genotype - 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 3.19 Understand how genes exist in alternative forms called alleles which give rise to differences in inherited characteristics. 3.20 Understand the meaning of the terms: dominant, recessive ...
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Dec 30, 2018
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