A Level Biology Revision (Year 13) "Multiple Alleles"
In this video, we look at multiple alleles. First we explore what is meant by multiple alleles. We then look at how the ABO blood group system in humans is an example of multiple alleles. Finally, we look at genetic crosses involving the ABO blood group alleles.
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A Level Biology Revision (Year 13) "Sex-Linked Genes"
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Multiple Alleles (ABO Blood Types) and Punnett Squares
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A Level Biology Revision (Year 13) "Monogenic Inheritance"
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A Level Biology Revision (Year 13) "Codominant Alleles"
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Pedigrees
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GCSE Biology - DNA Part 2 | Alleles | Phenotype vs Genotype (2026/27 exams)
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A Level Biology (Year 13) "Autosomal Linkage"
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Lethal Alleles Explained: Recessive and Dominant Lethals with Examples
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A Level Biology Revision (Year 13) "Substitution Mutations"
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A Level Biology (Year 13) "Epistasis"
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Punnett Squares - Basic Introduction
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A Level Biology Revision (Year 13) "The Hardy Weinberg Principle"
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A Level Biology Revision (Year 13) "Alleles, Genotype and Phenotype"
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