Meiosis Graphic Organizer For this Activity You will Need: Blue Colored Pencil Red Colored Pencil Lead Pencil
Why is Meiosis Important? Sperm = 23 chromosomes Egg = 23 chromosomes Zygote = 46 chromosomes Fertilization MITOSIS
Goal of Meiosis THINK! – What is the goal of meiosis? Fill the answer into the box on your graphic organizer. To create 4 sex cells (sperm or egg) each with HALF the number of DNA molecules (chromosomes) as the original cell
Interphase I DNA Replicates (doubles)
Prophase I Let’s say the normal chromosome # is 4… Chromosome pairs match up (1 from mom & 1 from dad)
Metaphase I Chromosome pairs line up in the middle of the cell
Anaphase I Chromosome pairs split. NO centromere breaking!
Telophase I Cells TEAR!
Cytokinesis I Cells split apart into two!
Interphase II NO DNA Replication (no doubling as must reduce the chromosome # in half)
Prophase II Duplicated chromosomes appear.
Metaphase II Duplicated Chromosomes line up in the middle of the cells
Anaphase II Duplicated Chromosomes split. Centromeres break.
Telophase II Cells TEAR!
Cytokinesis II 2 2 2 2 Cells Split into 4 Sex Cells
Meiosis Video Clips United Streaming Video Clip: Meiosis (3:48) Meiosis Animation_Glencoe Pay attention to these video clips to see meiosis in action.