Reproduction and Chromosome Transmission

Cell division general information asexual

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Unformatted text preview: Cell Division General information Asexual reproduction in unicellular organisms involves the division of a preexisting cell (an organism) to form two new cells (two organisms). This type of asexual reproduction (i.e., one cell divides to produce two) is similar in bacteria and some unicellular eukaryotic species (yeast, amoeba) Cell division is necessary for the formation of a multicellular organism from a fertilized egg. Bacteria reproduce asexually by binary fission. Prokaryotic organisms typically live as single cells. Some bacteria, such as E. coli, can divide every 20-30 minutes. Prior to cell division the bacterium duplicates its chromosome. Division, called binary fission, occurs by forming a septum down the center of the cell (Figure 3.4). The end result is two daughter cells that are genetically identical. FtsZ, a protein that is evolutionarily related to microtubules, helps to identify the site of wall formation between the two new daughter cells. 2 Eukaryotic cells progress through a cell cycle to produce genetically identical daughter cells. Eu...
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