Mitosis Flashcards
What happens during interphase?
During interphase, the cell grows and DNA is replicated
What happens in G1 phase
In G1, the cell grows.
What happens in S phase
In S, DNA synthesis happens.
What happens in G2 phase
In G2, the cell grows some more before the mitotic phases begins.
Why do cells go there mitosis
Multicellular organisms go through mitosis to grow and repair damaged tissues.
Interphase
The cell prepares to divide.
DNA is replicated.
There are now two copies of every chromosome.
The organelles are also replicated.
More ATP is produced to be used in cell division.
Prophase
The nuclear envelope breaks down and the nucleolus disappears.
Chromosomes are left floating in the cytoplasm.
The chromosomes condense and become shorter and fatter.
Metaphase
The chromosomes line up along the mid-line of the cell.
They are attached to the spindle by the centromere
Anaphase
The chromosomes break into two chromatids.
The sister chromatids separate at the centromere.
The spindles contract and pull the chromatids to each pole of the cell.
Telophase
The chromatids reach the opposite poles and begin to decondense (unravel), becoming chromosomes again.
Nuclear envelopes form around the chromosomes so there are now two nuclei.
Cytokineses
The cytoplasm splits and two daughter cells are formed. The daughter cells are identical to the original cell and to each other.
