• - number of chromosomes is reduced to 23

• - or n

• - two sets of chromosomes

- Division of body / somatic cells

- Happens in all types of cells except gametes / sex cells

- Involves 4 stages. (P.M.A.T.)

(a)  

● Chromosomes coil, thicken, shorten, and condense

● Centrioles move to opposite poles forming spindle fibers

● Nucleolus disintegrates, nucleus increase in size, and nuclear membrane disappears

● Longest stage of mitosis

(a)  

● Stage of migration

● Chromosomes move towards its respective poles

● Spindle fibers serves as the guide trails in chromosome migration

(a)  

● Stage of cytoplasmic division and nuclear reconstruction

● Chromosomes reach its respective poles and will undergo coiling

● Cell plate (plant cell) or cleavage furrow (animal cell) forms

● Nuclear membrane and nucleolus reappears

(a)  

- Assures the equal distribution of genetic materials between two newly produced nuclei

(a)  

- Ensures that both daughter cells have all cell organelles in them, including the two nuclei

(a)  

● Stage of separation

● Chromosomes move and align along equatorial plate or metaphase plate

● Centromere splits

● Chromatids separate with its own centromere

● Shortest stage of mitosis

(a)  

- the last and shortest stage

- doubling of all organelles

- cells are ready for division

- cell is able to produce proteins necessary for processing of chromosomes and breaking down the nuclear envelope

(a)  

• - number of chromosomes is at 46

• - or 2n

• - one set of chromosome

Human nucleus has ( (a)   ) chromosomes which are retained or divided in the process of cell division

- visible thread-like structures that bear the genetic information of the organism.

- occur in pairs; human have 23 pairs of homologous chromosomes; total of 46.

(a)  

no answer

(a)  

no answer

(a)  

no answer

(a)  

- occurs in all organisms

- process of cell multiplication

(a)  

● First segment of a cell’s life span

● Accommodates all the processes so that a cell may carry out its assigned function

● Cell shows its complete organelles

● Metabolic or resting stage of cell division

(a)  

- 1st stage after division

- recovers from cell division

- normal metabolic activities occurs

- increase in mass to prepare for cell division

- doubling of biomolecules

- “checkpoint”

(a)  

- 2 nd phase of interphase

- doubling of genetic material

- replication provides the future daughter cells with the same genetic material from the parent cell.

(a)