BISC 100

Binary Fission - Circular chromosome replicates and daughter chromosomes of that chromosome attach to different regions of cell 

During cell division, eukaryotic chromosomes condense into highly coiled 4 armed structures. The tight coiling and high degree of organization in this supercoiled DNA facilitates proper segregation during mitosis and cell division.

When the DNA is supercoiled in preparation for cell division, the pair of copies of each chromosome come together to form the characteristic x-shaped structure.

The point of attachment of the two complete copies occurs at the centromere. Each copy of the chromosome is called a chromatid*. The two copies of each chromosome are called sister chromatids. Sister chromatids are assigned to daughter cells by mitosis

• 1. replace lost or damaged tissue (burns/wounds)
• 2. Increase in size and complexity (fetus)
• 3. To reproduce

• The cell cycle multiplies cells
• Consists of two major phases