The below mentioned article article provides notes on mendelian inheritance. In Mendel's dihybrid experiments the F1 double heterozygote always showed independent assortment of the two pairs of genes at the time of gamete formation. In fact the law was justified only because the two genes were not linked to each other. This was true because each gene was located on [...]
In this article we will discuss about:- 1. Meaning of Crossing Over 2. Frequency of Crossing Over 3. Cytological Basis 4. Cytological Proof 5. Significance 6. Factors. Contents: Meaning of Crossing Over Frequency of Crossing Over Cytological Basis of Crossing Over Cytological Proof of Crossing Over Significance of Crossing Over Factors affecting Crossing Over 1. Meaning of Crossing Over: If [...]
In the early decades of the twentieth century T.H. Morgan and his associates A.H. Sturtevant, H.J. Muller, C.B. Bridges and a few others at Columbia University, New York were actively engaged in studies on Chromosome Theory of Heredity with a very suitable material Drosophila. From their studies on mutants in Drosophila they could assign several genes to chromosomes. For their [...]