(5) Sexual reproduction and variation in species

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Explain how sexual reproduction promotes variation in a species 

There are two processes in meiosis that can cause variation: 

- independent assortment

- crossing over

Independent Assortment 

- occurs during metaphase 1 

- homologous chromosomes move to the equator of the cell and line up. 

- They arrange themselves on the equator and result in the formation of different gametes. 

This creates 2 n new combinations of chromosomes in the next generation n =


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