Fall 2000 Biology 104 Fall 2000 Lecture 27 Monday October 30 Mitosis 1.
Life proceeds by division of cells.
For single-celled organisms this also comprises reproduction. Bacteria have single circular DNA molecules of 1-5 million base pairs. Eukaryotes typically have their DNA arranged in a number of linear chromosomes. These range in number from one to hundreds. The Drosophila fruit fly has four , while we humans have 23 .