Mitosis
-is composed of super coiled DNA molecule which is wound around on its associated protein.
-contains all the genetic information of the organism
-normal human being has 23 paired chromosomes or 46 chromosomes
-Two Forms:
Duplicated- contains duplicated DNA
Unduplicated- DNA is not duplicated
Chromosome
is as a process by which a cell divides to form two identical daughter cells.
Mitosis
Only ______ or body cells undergo mitosis.
somatic cells
____ or sex cells (Ovum and sperm) undergo meiosis.
Gametes
Mitosis is divided into several stages:
Prophase , Metaphase, Anaphase, Telophase
-It is the growth phase; resting phase;
-not considered as one of the stages of mitosis but a requisite for mitosis to occur
-Duplication of the genetic material
Interphase stage:
-The chromosome condenses or coils, becoming short and thick.
-The nucleolus disappears and the nuclear membrane disintegrates.
-The centriole and spindle fibers appear.
Prophase stage:
-Chromosomes are aligned at the equatorial plate
-The nuclear envelope has totally disintegrated and
-The polar fibers have reached the centromeres of the chromosomes and have begun interacting with them.
Metaphase stage :
-The two sister chromatids separate at its centromere, and each is attached to a spindle fiber as it migrates towards the opposite poles.
Anapahase stage:
-This is the phase that is marked when the two new daughter nuclei and their respective nuclear envelopes start to reform
-the chromosomes uncoil. In animal cells
-division of cytoplasm or cytokinesis which starts as a cleavage furrow or indentation around the middle that eventually pinches in, dividing the cell in two.
Telophase stage: