ANSWERS: 2
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I would recommend you look up "Non-Mendelian Inheritance" on the internet.
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These odd ratios usually occur when independent assortment is NOT taking place. Mendel's ratios only work with independent assortment. The odd ratios may be a result of autosomally linked alleles or sex-linked alleles. There are also other cases that you should look up such as epistasis.
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