Meiosis Cell Division

Meiosis Cell Division

Hi Viewer: Today we will discuss another very important cell function, which is known as Meiosis Cell Division.  Meiosis cell division do occur in plant cell and as well as in animal cell.  Living organisms produce gametes by this process.  It is very complicated too.  So let us check out what happens in the process, which is described below. Meiosis  Definition: Meiosis is the germ mother cell division in which the chromosome number of the mother cell is reduced to half in each daughter cell (reductional division). Site of occurrence:  In plant meiosis occurs in the microspore mother cell and megaspore mother cell and in animal it occurs in the germ mother cell of the testis and ovary.   PROPHASE 1 Leptotene (lepto-thin/tene-band): Chromosomes start to dehydrate It appears as distinct longitudinal threads 4.  Each chromosome has a beaded appearance 5.  The appearance is for the chromomeres 6.  In some insects the chromosomal ends are arranged in a particular direction. This is called a bouquet stage. N.B.   Draw two centrioles...
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Mitosis Cell Division

Mitosis Cell Division

Hi Viewer: Today we will discuss a very important cell function, which is known as Mitosis Cell Division.  Mitosis cell division do occur in plant cell and as well as in animal cell.  Living organisms attain growth by this process.  It is very subtle and complicated also.  So let us check out process, which is described below Mitosis Diploid cell When each type of species specific chromosomes are present doubly inside the cell then the cell is said to be diploid or the chromosomes are said to be in diploid condition.  It is represented by ‘2n’ eg. Somatic cells. Haploid cell When each type of species specific chromosomes are present singly inside the cell then the cell is said to be haploid or the chromosomes are said to be in haploid condition.  It is represented by ‘n’ eg. gametes   Cell division It is the process occurring in the living body by which the mother cells divide to produce two daughter cells Mitosis Cell division It is the process of somatic...
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