Somatic Cell Reproduction

What are the two phases of the the Cell Cycle

• Interphase (growth phase)

• Mitosis (division phase)

G1 Phase

cell prepares for DNA replication

Synthesis Phase

DNA is replicated

G2 Phase

Cell prepares for cell division

What is the longest part of the cell cycle?

Interphase

What is the function of Mitosis?

• Growth

• Repair

• Regeneration of body parts

• Asexual reproduction

• Maintenance of the body

Mitosis occurs in what type of cells?

Somatic cells

Why is interphase an important phase in the cell cycle?

each new cell has a full set of genetic material (DNA)

Are the phases of Mitosis a continuos process?

Yes they are continuos process

the phases do NOT stop and start

What are the phases of Mitosis

PMAT

• Prophase

• Metaphase

• Anaphase

• Telophase

What happens in Prophase?

• chromatin coils to form thick, condensed chromosomes

• nuculear membrane and nucleolus dissolves

• Centrioles move to opposite poles of the cell

• spindle fibers begin to form

What happens in Metaphase?

• duplicated chromosomes line up across the equator of the cell

• spindle fibers attach to the centromere of each duplicated chromosome

What happens in Anaphase?

• the centromere splits apart

• the chromatids get pulled to opposite poles by their own spindle fibers

• cytokinesis begins

What happens in Telophase?

• Starts when the chromatids have reached the two opposite poles of the cell

• now the chromatids are called single, unduplicated chromosomes

• chromosomes begin to unwind

• spindle fibers dissaper

• nuclear membranes reform around each new set of chromosomes

• cytokinesis finishes

• 2 NEW DAUGHTER CELLS ARE MADE