In this article we will discuss about Mitosis which is an indirect type of cell division:- 1. Subject-Matter of Mitosis 2. Process of Mitosis 3. Significance. Subject-Matter of Mitosis: Walter Fleming (1878), a German biologist, was the first to study the cell division. He stated that the nucleus of a dividing cell undergoes a series of changes. To this [...]
In this article we will discuss about Meiosis which is a type of indirect cell division:- 1. Subject-Matter of Meiosis 2. Types of Meiosis 3. Meiocytes 4. Process 5. Significance. Contents: Subject-Matter of Meiosis Types of Meiosis Meiocytes Process of Meiosis Significance of Meiosis 1. Subject-Matter of Meiosis: In the sexually reproducing organism two sex cells or gametes containing haploid [...]
In this article we will discuss about the molecular basis of crossing over. Any molecular model of crossing over must accommodate the explanation of the following phenomena: (a) Gene conversion, (b) Post-meiotic segregation, (c) Polarized conversion and (d) Negative interference. a. Gene Conversion: It is the unequal recovery of alleles in the region of exchange during genetic recombination in cases [...]