mitosis


What is Meiosis? Meiosis is the process in which a single cell divides twice to form four haploid daughter cells. These cells are the gametes – sperms in males and egg in females. The process of meiosis is divided into 2 stages. Each stage is subdivided into several phases.



Flipboard Email ThoughtCo. By Regina Bailey Updated on July 07, 2019 Mitosis is the phase of the cell cycle where chromosomes in the nucleus are evenly divided between two cells. When the cell division process is complete, two daughter cells with identical genetic material are produced. Interphase Ed Reschke/Photolibrary/Getty Images



during the G1 phase of the interphase most of the cell organelles undergo division (Mitochondria and chloroplast-fission,E.R and the Golgi Bodies also divide) except centrosome (found only in animal cell) which replicates itself during the S-phase of the interphase.When a cell divides during mitosis, some organelles are divided between the two.



Meiosis results in four cells called gametes — sex cells — but each has only one version of each gene. This way, when sperm and egg fuse during fertilization, the resulting zygote is back to having two versions of each gene."



Mitosis begins with prophase, which is marked by an increase in microtubule instability, triggered by M-Cdk. In animal cells, an unusually dynamic microtubule array (an aster) forms around each of the duplicated centrosomes, which separate to initiate the formation of the two spindle poles. Interactions between the asters and a balance between.



Mitosis and meiosis are two different types of cell division. Mitosis occurs in somatic cells and results in two identical daughter cells with a diploid (2n) number of chromosomes. This process is essential for growth and repair in the body. On the other hand, meiosis occurs in germ cells and produces four non-identical gametes with a haploid.



Best material for the study of mitosis in laboratory is 1. anther 2. root tip 3. leaf tip 4. ovary Cell Cycle and Cell Division Masterclass in Biology 3 Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level