The below mentioned article provides a study note on the Linkage of Genes. When Mendel’s work was rediscovered, thousands of experiments were conducted by the early biologists on the diverse groups of plants and animals. The results obtained in those cases were quite contrary to the principles of independent assortment, but none of the interpretations […]
Study Notes on Linkage of Genes
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Mechanism of Crossing Over: 4 Theories (With Diagram)
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The following points highlight the four theories proposed for the mechanism of crossing over. The theories are: 1. Janssen’s Classical Theory 2. Belling’s Copy Choice Theory 3. Uhl’s Theory 4. Darlington’s Theory of Crossing Over. Theory # 1. Janssen’s Classical Theory: Janssen (1909) believed that prior to the formation of chiasmata the homologous maternal and […]
Top 8 Types of Gene-Gene Interactions
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The following points highlight the top eight types of Gene-Gene Interactions. The types are: 1. Interaction between Dominant Factors 2. Complementary Factors (9:7 Ratio) 3. Supplementary Factor (9; 3: 4 Ratio) 4. Epistasis(12:3:l Ratio) 5. Effect-of Inhibitory Factor (13: 3 Ratio) 6. Duplicate Factors (15: 1 Ratio) 7. Multiple Factors or Polygenic Inheritance 8. Lethal […]
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