In this article we will discuss about the linkage and recombination of genes. Morgan and his group observed in Drosophila that when the two genes in a dihybrid cross were situated on the same chromosome, the proportion of parental gene combinations were much higher than the non-parental type or new combinations (also called recombination) of […]
Linkage and Recombination of Genes | Genetics
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Principle of Dominance and Paired Factors (With Diagram)
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The following points highlight the seven main exceptions to the principle of dominance and paired factors. The exceptions are: 1. Incomplete Dominance 2. Co-Dominance 3. Multiple Alleles 4. Test Cross 5. Pleiotropy 6. Polygenic Inheritance 7. Complementary Genes. Exception # 1. Incomplete Dominance: It is a phenomenon in which phenotype of the F1 hybrid offspring […]
Classification of Genetic Disorders: 2 Types
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The genetic disorders can be divided as: Type # 1. Mendelian Disorders: These are mainly determined by alteration or mutation in the single gene. These disorders are transmitted in next generation according to the principle of inheritance and can be studied by pedigree analysis. These can be dominant or recessive. For example, Autosomal dominant disorder […]
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