讲义文稿内容遗传学遗传chapter14a prokaryotic and organelle genetics- part i.pdf

Chapter 14 Prokaryotic and Organelle Genetics Prokaryotic and Organelle Genetics Part I Copyright © The McGraw-Hill Companies, Inc. Permission required to reproduce or display 15-1 Outline Outline  General overview of bacteria  General overview of bacteria  The bacterial genome  The bacterial genome  Gene transfer in bacteria  Gene transfer in bacteria Copyright © The McGraw-Hill Companies, Inc. Permission required to reproduce or display 15-2 Common features of bacteria Common features of bacteria  Lack ined nuclear membrane.  Lack ined nuclear membrane.  Lack membrane bound organelles.  Lack membrane bound organelles.  Chromosomes fold to form a nucleoid body.  Chromosomes fold to form a nucleoid body.  Most have a cell wall.  Most have a cell wall.  Mucus-like coating called a capsule.  Mucus-like coating called a capsule.  Membrane encloses cells with mesosome which serves  Membrane encloses cells with mesosome which serves as a source of new as a source of new membranes during cell membranes during cell division. division.  Many move by flagella.  Many move by flagella. Copyright © The McGraw-Hill Companies, Inc. Permission required to reproduce or display 15-3 Bacteria exhibit immense diversity Bacteria exhibit immense diversity  Outnumber all other organisms on earth.  Outnumber all other organisms on earth.  10,000 species identified.  10,000 species identified.  Smallest 200 nm in diameter, the largest 500 m in length.  Smallest 200 nm in diameter, the largest 500 m in length.  Remarkable metabolic diversity allows them to live  Remarkable metabolic diversity allows them to live almost anywhere. almost anywhere.  Habitats range from land, to aqua