Mitosis Phase
The cell grows, DNA is copied, and Centrosomes replicate.
Interphase
Primary growth phase, the longest phase
G1 (gap phase 1)
Resting Phase G0
point of constriction
centromeres
binary fission occurs in prokaryotes or eukaryotes
prokaryotes
Nuclear envelope fragments
Microtubules attached to kinetochore
Centrosomes move toward opposite poles
prometaphase
Replication of DNA
S ( synthesis)
M phase duration
an hour
attachment site for microtubules
kinetochore
This process begins at the origin of replication and proceeds in two directions to site of termination
replication
Chromosomes condense and become visible
Mitotic spindle forms
The nuclear envelope breaks down
Nucleolus disappears
prophase
Organelles replicate, and microtubules organize
G2 (gap phase 2)
Liver cell development
more than a year
stay attached at centromere by cohesion
Chromosomes are separated into what areas of the cell during fission
the opposite ends
chromatids separate, the cell elongates, a cleavage furrow forms, and daughter nuclei form
2 answers
Anaphase and Telophase
subdivided into 5 phases
M (Mitosis)
Typical mammal cell
24 hours
pulled to opposite poles in anaphase
sister chromatids
this forms to divide the cell into cells
hint: piercings
septum
Chromosomes line up at the metaphase plate
Spindles attach to the sister chromatids
metaphase
separation of 2 new cells
Cytokinesis
cell cycle duration for a fruit fly embryo
8 minutes
nuclear envelopes reform around the chromosomes in this phase
telophase
What problems occur within binary fission that could cause problems?
Hint: think about what kind of cells are produced
Since the cells produced through this type of reproduction are identical, they are all susceptible to the same types of threats, such as environmental changes and antibiotics. These hazards could destroy an entire colony.