AP Biology The Cell Cycle Part 1

One cell becoming two

Binary Fission in Prokaryotes Origin of replication Cell wall Plasma membrane Bacterial chromosome E. coli cell Two copies of origin Chromosome replication begins. Soon thereafter, one copy of the origin moves rapidly toward the other end of the cell. Replication continues. One copy of the origin is now at each end of the cell. Origin Replication finishes. The plasma membrane grows inward, and new cell wall is deposited. Two daughter cells result.

Chromatin vs. Chromosomes appearance within the cell.

Somatic cells vs. Germ cells Human egg surrounded by sperm Human cheek cells

Coiling up of Chromatin using histones

Sister Chromatids

Mitosis (1 Division) vs. Meiosis (2 Divisions)