LS3.B: Variation of Traits

 
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In this video Paul Andersen explains how variation is created in a population over time.  Variation in offspring is caused by genetic recombination, mutations and environmental effects.  Parental DNA is recombined using the process of meiosis.  Mutations can add novel genes to a population and the environment can shape the expression of genes.  A K-12 teaching progression is also included.

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LS4.A: Evidence of Common Ancestry and Diversity

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LS3.A: Inheritance of Traits