Biology 1201A Lecture Notes - Cytokinesis, Kinetochore, Polyploid

• School: Western University
• Department: Biology
• Course: Biology 1201A
• Professor: Richard Gardiner

Document Summary

What do all cells require to survive: a complete set of genetic instructions, produce required molecules, direct life processes, genetic instructions are coded in the dna of cells. Why do cells divide: growth, repair, development. Activites of a cell from one cell division to the next: cell grows, adding more cytoplasmic constituents, dna is replicated, cell divides into two identical daughter cells. Prokaryotic cell: no nucleus genetic material (dna) in cytoplasm, no membrane-bound organelles, example: bacteria, cell division is called binary fission. Prokaryotic cell cycle: transmit a complete copy of genetic information (dna, transmit materials necessary for cell to survive and use genetic information. Chromosomes: chromosomes =long thread like structures, highly condensed during mitosis, dna + protein, contain most of the organisms genetic information. 46 strands (46 chromosomes: strands of linear dna, human cells, average length 4cm, each strand coiled up, human cell approx.