SCIENCE

• MEIOSIS ONLY OCCURS IN SEX CELLS OR GAMETES
• SEX CELLS ARE ALSO CALLED GAMETES
• MEISIS IS ALSO CALLED REDUCTION DIVISION
• MEIOSIS 1 IS TO PRODUCE 2 CELLS WITH HALF THE CHROMOSOME NUMBER
• MEIOSIS 2 FOLLOWS THE USUAL MITOTIC PROCESS AND SIMPLY PASSED ON THE HAPLOID CHROMOSOME NUMBER RESULTING TO 4 HAPLOID DAUGHTER CELLS
• PROPHASE 1, THE CHROMOSOMES ARE NOW DOUBLE STRANDED OR COMPOSED OF SISTER CHROMATIDS
• PAIRING OF HOMOLOGUS CHROMOSOMES OR SYNAPSIS OCCURS IN PROPHASE 1
• CROSSING OVER OR GENETIC RECOMBINATION ALSO OCCURS IN PROPHASE 1
• METAPHASE 1 IS WHEN TETRADS LINE UP AT THE EQUITORIAL REGION AND SPINDLE FIBERS ARE FORMED
• ANAPHASE 1 WHEN THE CHROMOSOMES IN EACH TETRAD SEPERATE AND MOVE TOWARDS THE OPPOSITE POLES
• TELOPHASE ONE IS COMPLETED AND TWO HAPLOID CELLS ARE FORMED
• PROPHASE 2, THERE IS NO NEED FOR CHROMOSOMES TO REPLECATE. EACH OF THE TWO DAUGHTER CELLS CONTAIN ONE MEMBER OF A HOMOLOGUS PAIR
• METAPHASE 2 WHEN THE CHROMOSOMES ALIGN AT THE EQUATOR
• SISTER CHROMATIDS SEPERATE FOLLOWING THE SPLITTING OF CENTROMERES IN ANAPHASE 2
• TELOPHASE 2 INCLUDES THE CHROMATIDS AGGREGATE AT THE OPPOSITE POLES
• FORMATION OF GAMETES OR SEX CELLS IS CALLED GAMETOGENISIS
• GAMETOGENISIS INCLUDES FORMATION OF SPERMATOZOA AND OVUM OR EGG CELL
• FORMATION OF SPERMATOZOA IS SPERMATOGENISIS
• FORMATION OF EGG CELLS OR OVUM IS OOGENISIS