The below mentioned article provides a short note on Microtubule and Spindle. During the process of cell division the cytoplasmic network of microtubules disappears and the microtubules are reassembled in the form of spindle in the dividing cell (in both mitotic and meiotic cell division). Though the controlling pattern of this disappearance and recognized is not very clear, but it [...]
Learn about the Comparison between Meiosis and Mitosis. Comparison # Meiosis: 1. In mitosis, chromosome doubling is followed by separation of daughter chromosomes, i.e., there is division of centromere in mitosis. 2. Mitosis occurs in all the cells of the body. 3. It completes in one sequence of stages, i.e., there is only series of divisional stages. Prophase: 4. Prophase [...]
In this article we will discuss about the relationship between genetic and cytological crossing over. The exchange of homologous segments of chromatids between homologous chromosomes during meiosis was cytologically demonstrated by Stern in 1931 in D. melanogaster and by Creighton and McClintock in the same year in maize. Stern used stocks of D. melanogaster carrying chromosomal structural changes. These stocks [...]