Genetic Variation
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Catchup on Genetic Variation
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4 Terms
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Independent Assortment of Homologous Chromosomes
Random alignment of chromosomes during meiosis
Different combinations of chromosomes and different allele combinations in each gamete
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Crossing over of non-sister chromatids
Exchange of genetic material between non-sister chromatids.
New combinations of alleles on chromosomes
It can also break the linkage between genes
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Random fertilisation
Any male gamete can fuse with any female gamete.
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Mutation
Random change in the DNA base sequence
Results in the generation of a new allele
A mutation must occur in the gametes to be passed on.
Note 
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