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We have three 6th grade Science classes and two 8th grade Science classes blogging here from the Pacific Northwest in Chimacum, WA! Sixth graders are learning a bit about Mt Saint Helens, environmental science through fresh water ecology, and physical science this year. Eighth graders are learning about life science this year. Please join us as we learn Science by exploring our world.
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teacher: Alfonso Gonzalez

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Cell Mitosis Q1. Chromisomes duplicates themselves. Then both of them move to the opposite cell walls. The cell elongates and its plasma membrane grows inward, then the cell splits. The cell divides and creates two sister cells. Those cells are able to work because the mother cell gives them everything they need to produce and survive.
Q2. Interphase: Is the longest period of the complete cell cycle during which the DNA replicates, the centrioles divide, and the protiens are actively produced.
Prophase: During the first mitotic stage, the nucleolus fades and condenses into chromosomes. Each chromosome comprises two chromatids. Microtubules of a cytoskleton disosemble.
Prometaphase: The nuclear envelope breaks down and there is no longer a reconizable nucleus. Some mitotic spindle fibers elongate from the centrosomes and attach tp kinetochores, protein bundles at the centromere region on the chromosomes where sister chromatids are joined.
Metaphase: The tension applied by spindle fibers aligns chromosomes in one plane at the center of the cell.
Anaphase: Spindle fibers shorten, the kinetochores seperate, and the chromatids are pulled apat and begin moving to the cell poles.

Article posted January 25, 2012 at 11:46 AM • comment • Reads 789 • Return to Blog List

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