1. Ch 7-1 Cellular Reproduction
Interphase & Mitosis make up Cell Cycle (pg 174)
The mitotic (M) phase of the cell cycle alternates
with the much longer interphase.
The M phase includes mitosis
and cytokinesis.
Interphase accounts for 90% of the cell cycle.

2. Terms for the hereditary material (DNA) found in the
nucleus.
Chromatin—dense mass of material within the
nucleus; composed of individual chromosomes
Chromosomes—structure that carries the genes;
composed of protein & DNA
Chromatid—each individual strand of the double
stranded chromosome resulting from replication in
Prophase.
Centromere—point at which sister chromatids are
attached
*DNA, Protein spool, Chromatin, & Chromosomes
(Illustrations on pg 173)

3. The Cell Cycle Interphase—(resting stage) Not a part of mitosis
Cell grows & carries on all life activities
DNA & Chromosomes replicate; producing a 2nd set of chromosomes.
Interphase has three subphases:
the G1 phase (“first gap”) centered on growth,
the S phase (“synthesis”) when the chromosomes are copied,
the G2 phase (“second gap”) where the cell completes preparations for cell division,

4. There are four stages of Mitosis!
Mitosis (M)—the cell divides thru the process by which chromosomes are duplicated & distributed to daughter nuclei; each daughter nucleus carries the same set of genetic information as the parent nucleus.
There are four stages of Mitosis!
Prophase
Metaphase
Anaphase
Telophase

5. Prophase Chromosomes shorten & thicken becoming visible
Spindle fibers & asters form
Centrioles move towards opposite poles
By the end, the nucleus & nucleolus have completely disappeared

6. Metaphase
Paired chromatids (chromosomes) are lined up at the equator.
Microtubules are attached at the centromere.
Anaphase
Centromere splits & the two sister chromatids
separate from one another & start moving
towards opposite poles…or sides of the cell.

7. Telophase
Cytoplasm begins pinching in towards the center of the cell…(cytokinesis)
Spindle fibers & asters disappear
Two new nuclei are formed
Chromosomes become a mass of chromatin again
The two daughter cells separate into two individual cells
Animal Cell—pinching in a cell membrane to separate the two cells
Plant Cell—a cell plate forms which will eventually become the cell wall…also they go thru mitosis without the centrioles.