LS3B - 特征的变异


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.

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下一代科学标准生活科学纪律核心思想3B:特征的变异

在这个视频中,Paul Andersen解释了如何随着时间的推移在人口中创建变化。后代变异是由遗传重组,突变和环境影响引起的。父母DNA使用减数分裂的方法重组。突变可以向群体添加新基因,环境可以塑造基因的表达。