What term describes DNA in G1 phase?
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What term describes DNA in G1 phase?
• Chromatin
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What happens to the DNA in S Phase? What is DNA called?
• Doubled, duplicated, copied
• Chromatin
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What happens to DNA in G2? What is DNA called at the end of this phase?
• DNA is coiled, condensed, and joined to its duplicate
• Duplicated chromosome
• Label the centromere.• Label the sister chromatids
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What happens to centrioles and everything else in the cytoplasm during G2
phase?
• Centrioles double• Everything doubles
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How would you describe sister chromatids?
• Joined, identical chromosomes
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What is the first phase of mitosis?
• prophase
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What happens to the nuclear envelope during prophase?
• dissolves
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What is produced from the centrioles during prophase?
• Spindle Fibers
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Where do spindle fibers attach to chromosomes?
• centromere
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What happens by the end of prophase?
• Centrioles have moved to opposite poles
• Spindle fibers have attached to the centromere of the duplicated chromosomes
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Name the second phase of mitosis.
• Metaphase
• What does “meta” mean?• middle
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Where do chromosomes align themselves during metaphase?
• At the equator
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Name the third phase of mitosis.
• Anaphase
• What does “ana” mean?• To separate
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What marks the beginning of anaphase?
• Spindle fibers begin to separate duplicated chromosomes (sister chromatids)
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What do we call the DNA being pulled towards the poles?
• Unduplicated chromosomes
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Name the fourth phase of mitosis.
• Telophase
• What does “telo” mean?• The end
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What marks the beginning of telophase?
• Unduplicated chromosomes have reached the poles
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What happens to chromosomes during telophase?
• Contained inside the nuclear membrane
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What happens to spindle during telphase?
• Break down
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What happens to the nuclear envelope during telophase?
• Two new nuclear envelopes form
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How many nuclei are produced after mitosis? How many cells?
• 2 nuclei
• 1 cell
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What happens during cytokinesis?
• Everything outside the nucleus in the cytoplasm split into two separate cells