meiosis graphic organizer for this activity you will need: blue colored pencil red colored pencil...
Post on 24-Dec-2015
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Meiosis Graphic OrganizerMeiosis Graphic OrganizerMeiosis Graphic OrganizerMeiosis Graphic OrganizerFor this Activity You will Need:For this Activity You will Need:
Blue Colored PencilBlue Colored PencilRed Colored PencilRed Colored Pencil
Lead PencilLead Pencil
Why is Meiosis Important?
MEIOSIS 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
Chromosome pairs match up
(1 from mom & 1 from dad)
Let’s say the normal chromosome # is 4…
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
Cells Split into 4 Sex Cells
2 2 2 2
• United Streaming Video Clip: Meiosis (3:48)
• Meiosis Animation_Glencoe
– Pay attention to these video clips to see meiosis in action.
Meiosis Video Clips
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