01:119:115 Lecture Notes - Lecture 10: G1 Phase, G2 Phase, Cell Cycle
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12 Oct 2016
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Lecture 10 - the cell cycle: organization of genetic material, introduction. All living things are made of cells. Cells are the smallest unit of life. Cells come only from other cells by cell division. Cell division is an integral part of the cell cycle. What are the three functions of cell division: reproduction, growth and development, tissue renewal, genetic material of the cell. Genome = all the dna in a cell. In prokaryotic cells = a single dna molecule. Dna molecules in a cell are packaged into chromosomes. Eukaryotic chromosomes consist of chromatin, a complex of dna and protein that. Every eukaryotic species has a characteristic number of chromosomes in each cell condenses during cell division nucleus. Nucleosome: chromosome number n = 23. All animals are diploid (body cells in animals are always diploid) N = number of chromosomes in an organism"s sex cell (gametes) (haploid number) Ploidy = # of chromosomes in a cell.
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