Bio 111 - Lecture 3

Bio 111 - Lecture 3 - Biology 111 Lecture 3 - Cells and...

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Biology 111 Lecture 3 - Cells and Cell Cycles I. Variations in Organismal Biology A. Diversity and Stability of Living Things 5. Historical Perspective a. Out understanding began with the discovery of the cell. 1600 " s - Microscope Developed, Cells Discovered 1700 " s - Nucleus Seen 1800 " s - Staining, Chromosomes Seen 1900 " s - Great Improvements in chemistry, DNA found to be # the program " 6. DNA Molecule in the source of variety and stability of organisms In variety the differences in DNA are observed In Stability II. Chromosome Characteristics A. DNA, Genes, and Chromosomes 1. Long molecule coiled into each chromosome 2. Gene - speciFc regions of DNA on particular chromosomes 3. Each chromosome contains hundreds or thousands of genes 4. Chromosomes can be seen with a light microscope - Diploid cells have two of each kind of chromosome. B. Diploid vs. Haploid Cells 1. Organisms have speciFc number of chromosomes in cells 2. Most cells in plants and animals are DIPLOID - Diploid cells have two of each chromosome. 3. Organisms also have haploid cells.
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This note was uploaded on 09/11/2008 for the course BIO 111 taught by Professor Parfitt during the Fall '07 term at Michigan Flint.

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Bio 111 - Lecture 3 - Biology 111 Lecture 3 - Cells and...

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