MITOSIS – the cell cycle

INTERPHASE (ANIMAL CELL) Animal cell interphase. The DNA has been replicated. Also, notice the increased cell size as the cytoplasm has been enlarged.

PROPHASE Animal cell in prophase. Notice that the DNA has been condensed into chromosomes.

METAPHASE Animal cell metaphase. Notice the chromosomes are lined up along the equator of the cell. Two poles representing each daughter cell are also formed by the spindle fibers.

ANAPHASE Animal cell anaphase. Notice the spindle fibers begin to pull the two sets of chromosome toward the opposite poles.

TELOPHASE Animal cell telophase. Notice the two poles begin to condense to form two nuclei. The cells begin to build the cell membrane in between.

INTERPHASE Interphase: G1 – cell grows and develops, chromosomes are uncoiled and invisible S – chromosomes replicate and divide G2 – chromosomes shorten and coil

PROPHASE Prophase: chromosome condensation nuclear membrane disintegrates. The duplicated chromosome subunits (each one called chromotid) join together at the centromeres. At late prophase, the microtubular spindle begin to radiate from the centromeres.

METAPHASE Metaphase: The chromosomes move to the equator of the cell and align to the equatorial plane.

ANAPHASE Anaphase: Two sister chromotids separate into 2 independent chromosomes as the centromere divides. Shortening of the microtubular spindle fibers pulls the chromosomes in opposite directions toward the poles. At the end of the anaphase, the chromosomes lie in 2 groups near opposite poles of the spindle. Cytokinesis starts at the middle of the equatorial plane.

TELOPHASE During telophase: nuclear membrane forms around each set of chromosomes, chromosomes uncoil and become less distinct and nucleoli are also formed new cell plate expands between cells.

Telophase

Guess the stage!

Guess the stage!

Guess the stage!

Guess the stage!

Guess the stage!