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Biology October-06-08

Biology October-06-08 - Biology October-06-08 GENETICS Cell...

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Biology October- 06-08 GENETICS – Cell Division and Inheritance Sameness – ensuring that genetic information is the exact same in child as it is in the parent Okazaki Fragments – small bits of DNA synthesized during DNA replication. In a plant cell you may find Okazaki fragments in the chloroplasts, mitochondrion, and the nucleus. Prokaryotic Cells (Bacteria and Archaea) have no nucleus, but they have DNA. Every cell will have a specific set of DNA genomes. DNA must be replicated by the nucleus and the mitochondrion in an animal cell. Plant cells have 3 different genomes in the chloroplasts, mitochondrion, and the nucleus. Basically all cells replicate their genomes in the same way. Most of the cells in adult animals are not actively dividing. Only tissues that renew often will hold replicating cells for tissue renewal (and repair) and growth. Cell division is relevant in many microbes due to the exponential growth when linked to the division of microbes. The plants have a meristem that is used to make the tree grow up and out at the same time.
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