CHAPTER 14 LECTURE NOTES 3.pdf - 1 2 3 4 5 6 7 8 9 10 11 12...

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1. expanding the rules and terminology to follow two (or more) genes in a cross 2. A. law of independent assortment 3. 1. dihybrid cross – cross between individuals that are both heterozygous for two different genes that you are following 2. when Mendel performed dihybrid crosses he found phenotype ratios of 9:3:3:1, which is explained by the product rule 3. this led to Mendel’s law of independent assortment: segregation of any one pair of alleles is independent of the 4. segregation of other pairs of alleles 5. we now know that this is also a consequence of events in meiosis 6. this doesn’t hold perfectly true for all genes (see genetic linkage below) 7. using the law of independent assortment in genetic problems 8. expanding the rules and terminology to follow two (or more) genes in a cross

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