Ch. 12 Test Prep
Prokaryotic/Eukaryotic
Chromosomes
• Know the differences
Why do cells divide?
• Reproduction
• Growth/Development
• Tissue renewal
Chromatin vs. Chromosomes
• What is the difference?
• Structure?
• When are they found in this form?
Eukaryotic Chromosome
Genome
= DNA
Chromosomes =
DNA + PROTEIN
(visible under light
microscope)
Chromatin =
DNA + PROTEIN
(unwound)
DNA
Chromosomes
Chromatid
Sister
Chromatids
Terms to Know
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Centromere
Centrosome
Centriole
Kinetochore
Kinetochore microtubules
Mitotic spindle
Nonkinetochore microtubules
Spindle apparatus
Spindle fibers
Cell Cycle
• Know all the phases.
• Relative time spent in each.
• What happens in each phase?
Spindle Apparatus
• What makes up the spindle apparatus?
• How does it work?
Cytokinesis
• How does it occur?
• How is it different in plant and animal
cells?
Cell Cycle Control
• What protein(s) contol the cell cycle?
How?
• Internal regulators?
• External Regulators?
• What is cancer?
Lab Potion
• Be able to identify each phase of the cell
cycle @ 400x and justify your answer.
• Plants and animals.
Prometaphase
Onion Root Tip
White Fish Blastula
Telophase
Anaphase
Prophase
Metaphase