Mitosis vs Meiosis.pdf

CELL DIVISION A comparative lesson between Mitosis & Meiosis General Biology I with Sir Jeniel A. De Leon  Describe the Explain the Identify disorders and stages of significance or diseases that result mitosis/meiosis application of from the malfunction given 2n = 6...

CELL DIVISION A comparative lesson between Mitosis & Meiosis General Biology I with Sir Jeniel A. De Leon  Describe the Explain the Identify disorders and stages of significance or diseases that result mitosis/meiosis application of from the malfunction given 2n = 6 mitosis/meiosis of the cell during the cell cycle REVIEW REVIEW REVIEW CELL DIVISION Cell division is the process by which a single cell divides into two or more daughter cells, each with the potential to grow, develop, and carry out specific functions. It is a fundamental process in biology that is essential for the growth, repair, and reproduction of living organisms. Cell division can occur through two main mechanisms: mitosis, which produces two identical daughter cells, and meiosis, which produces four genetically diverse daughter cells.  MITOSIS MEIOSIS Single cell divides into two Single cell divides into four identical daughter cells. This daughter cells, each with half type of division is essential for the number of chromosomes growth and repair in of the parent cell. Meiosis is multicellular organisms, as well critical for sexual as for asexual reproduction in reproduction, as it allows for some single-celled organisms. the production of gametes.  VOCABS TO REMEMBER TELOMERE CHROMOSOME structures made from Organized package of DNA sequences and DNA in the Nucleus proteins found at the ends of chromosomes CENTROMERE constricted region of a chromosome CHROMATIDS two identical halves of a chromosome that has been replicated in preparation for cell division  VOCABS TO REMEMBER SPINDLE CENTROSOME CENTRIOLES FIBERS A centrosome is a small Centrioles are cylindrical The spindle fibers are organelle found in organelles found in microtubules that eukaryotic cells, which inside the centrosome separates the functions as a that are involved in the chromosomes into microtubule-organizing organization of cell two daughter cells. center. division. VOCABS TO REMEMBER DIPLOID CELLS HAPLOID CELLS Cells that have pairs of chromosomes Cells that have only one chromosome are called diploid cells. from each pair. In the body cells of most organisms, Sex cells have only one chromosome chromosomes occur in pairs. from each pair of chromosomes. MEIOSIS IMPORTANCE REPRODUCTION Meiosis ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes GENETIC DIVERSITY Meiosis also produces genetic variation by way of the process of recombination PHASES OF MEIOSIS  PHASES OF MEIOSIS Meiosis involves two divisions of the nucleus and the cytoplasm. These two divisions are phases called meiosis I and meiosis II. MEIOSIS: INTERPHASE A reproductive cell goes through interphase before beginning meiosis I. During interphase, the reproductive cell grows and copies, or duplicates, its chromosomes. PHASES OF MEIOSIS REVIEW MITOSIS & MEIOSIS COMPARISON  points of mitosis meiosis difference Occurence Somatic (body) cells Gametes (Sperm & Egg) Number of Halved, to the haploid chromosomes after Maintained (2n) number (n) division Major Stages 1 2 (Meiosis 1 and 2) Synapsis and crossing- No Yes over  points of mitosis meiosis difference Homologous Chromosome What separates during (Anaphase 1) Sister Chromatids anaphase Sister Chromatids (Anaphase 2) Number of daughter 2 4 cells MITOSIS Given that the number of chromosomes in the parent cell is 6 (2n), how many chromosomes will each daughter cells have after telophase prophase metaphase anaphase telophase Number of chromosomes 6 MEIOSIS Given that the number of chromosomes in the parent cell is 6 (2n), how many chromosomes will each daughter cells have after telophase prophase I metaphase I anaphase I telophase I Number of chromosomes 6 prophase II metaphase II anaphase II telophase II Number of chromosomes MEIOSIS IS NOT JUST A PROCESS OF CELL DIVISION it's a beautiful dance of chromosomes that ensures genetic diversity and continuity of life. THANK YOU FOR LISTENING!