nge, energy metabolism as well as cellular repair.
Isolation and characterization of the Cdc 24 mutants in S. cerevisiae has raised the question as to how the Cdc24 gene acts at cellular and molecular levels. The present paper critically examines this question.
Mitosis, the process by which a cell's nucleus replicates and divides in preparation for division of the cell, results in two cells that are genetically identical a necessary condition for the normal functioning of virtually all cells. Mitosis is vital for a number of cellular processes, including growth, repair and replacement of damaged or worn-out cells and for asexual reproduction; mitosis is the sole mode of reproduction for many single-celled organisms. (A consequence of this fact is that growth and reproduction in unicellular organisms is essentially the same process.)
In meiosis (which is in some ways a parallel process to mitosis) genetic information, contained in chromosomes, is mixed and divided into sex cells with half the normal number of chromosomes. The sex cells can later combine to form offspring with the full number of chromosomes. The random sorting of chromosomes during meiosis assures that each new sex cell, and therefore each new offspring, has a unique genetic inheritance. Meiosis differs from normal cell division (mitosis) in that it involves two consecutive cell divisions instead of one and the genetic material contained in chromosomes is not copied during the second meiotic division. While mitosis produces identical daughter cells, meiosis randomly mixes the chromosomes, resulting in unique combinations of chromosomes in each daughter cell.
The life cycle of eukaryotic cells is a continuous process typically divided into three phases: interphase, mitosis, and cytokinesis. Interphase includes three stages G1, S and G2. In G1, a newly formed cell synthesizes materials needed for cell growth. In the S stage, deoxyribonucleic...