Meiosis Graphic Organizer

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Presentation transcript:

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.