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Bio Unit 6
| Question | Answer |
|---|---|
| cell division occurs in what two stages | mitosis and cytokenesis |
| why is it important to have a good SA:V ratio | because it helps things diffuse faster and the cell to live |
| the higher the mass, the _____the SA:V ratio | lower |
| mitosis | division of the nucleus |
| cytokenesis | division of the cytoplasm |
| chromosomes are made of_____ | DNA |
| chromosomes are duplicated ________ chromatid | before |
| what happens in prophase | nuclear envelope breaks down, chromosomes visible, centrioles move, spindle fibers form |
| what happens in metaphase | chromosomes line up in the middle and are attached to the spindle fibers |
| what happens in anaphase | chromatids are pulled away from eachother |
| what happens in telophase | two nuclei, nuclear envelope reforms |
| what happens in cytokenesis | the cytoplasm splits and two IDENTICAL DAUGHTER CELLS ARE FORMED |
| list the order of the cell cycle | G1,G2,Rest/S phase, mitosis and then cytokenesis |
| what happens in interphase 1 | cell replicates DNA |
| what happens in prophase 1 | each chromosome pairs with homologus chromosome to form a tetrad |
| what happens in metaphase 1 | spindle fibers attach to chromosomes and line up in the middle |
| what happens in anaphase 1 | spindle fibers pull them away |
| what happens in telophase 1 | creates two unique cells |
| what happens in prophase 2 | NO COPYING OF CHROMOSOMES |
| what happens in metaphase 2 | chromosomes line up in the center |
| what happens in anaphase 2 | seperate move to opposite sides of the cell |
| what happens in telophase 2/cytokenesis | we get 4 genetically diverse haploid cells |
| G1 | cell grows, synthesizes proteins and organelles |
| Rest phase/S phase | S phase is DNA replication, rest phase they just stop because they don't need to grow |
| G2 | cell gets ready to divide |