The following points highlight the top five criteria for genetic polymorphism. They are: 1. Selection 2. Mutation and Mutation Rates 3. Genetic Drift 4. Migration Pressure or Gene Flow 5. Meiotic Drive. Criteria # 1. Selection: Selection is the non-random or selective reproduction of genotypes. The elucidation of the selective forces which may have given rise to any particular polymorphism [...]
In this article we will discuss about:- 1. Meaning of Crossing Over 2. Frequency of Crossing Over 3. Factors 4. Molecular Mechanism. Meaning of Crossing Over: Crossing over may be defined as an interchange of corresponding chromosomal parts between members of a homologous chromosome resulting in a recombination of genes. One, two or more fragments may be interchanged during crossing [...]
Human blood can be classified into different blood group systems, e.g. ABO blood group, MN blood group and Rh blood group. All of these blood groups in man are under genetic control, each series of blood groups being under the control of genes at a single locus or of genes that are closely linked and behave in heredity as though [...]