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Cell Division ~
Cell division notes taken in Honors Biology
28
Biology
9th Grade
01/26/2012

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Term
A blood cell lives about ___ days.
Definition
120
Term
A skin cell lives about __ days.
Definition
30
Term
Cells in the body divide each second to maintain ________ (the proper balance of cells)
Definition
homeostasis
Term
define somatic cells
Definition
body cells (Skin, muscle, blood)
Term
________ only occurs in somatic cells.
Definition
Mitosis
Term
List the 3 phases of interphase
Definition

G1 Phase

S Phase

G2 Phase

Term
In which phase of interphase are proteins and organelles made?
Definition
G1 Phase
Term
In which phase of interphase is DNA replicated?
Definition
S Phase
Term
In which phase of interphase does the cell prepare for mitosis?
Definition
G2 phase
Term
define cytokinesis
Definition
division of the cytoplasm of the cell
Term
In which phase of mitosis does chromatin which has been replicated condense and form chromosomes?
Definition
prophase
Term
What are sister chromatids?
Definition
Chromosomes that are formed when chromatin condenses
Term
In which phase of mitosis do sister chromatids line up in the middle of the cell?
Definition
metaphase
Term
In which phase of mitosis are sister chromatids pulled apart to the opposite ends of the cell?
Definition
anaphase
Term
In which phase does the nuclear envelope reform and chromosomes turn back into chromatin?
Definition
telophase
Term
During cytokinesis in plant cells, what forms between 2 nuclei and eventually becomes a cell wall?
Definition
cell plate
Term
What is a cleavage furrow?
Definition
where the cell membrane pinches inward for cytokinesis in animal cells
Term
define binary fission
Definition
division of a prokaryotic cell into 2 offspring cells
Term
define mitosis
Definition
a type of cell division that results in daughter cells with genetic information that is identical to that of the original
Term
define meiosis
Definition
a type of cell division that reduces the number of chromosomes in the new cells by half
Term
Cells spend most of their lifetime in which phase?
Definition
interphase
Term
Prokaryotic cells reproduce by the process of
Definition
binary fission
Term
define polar fibers
Definition
fibers that extend from centrosome to centrosome during mitosis
Term
define G phase
Definition
the phase when cells exit the cell cycle
Term
What does M phase stand for?
Definition
Mitosis
Term
List the stages of Meiosis in order
Definition
Interphase
Meiosis 1
Cytokinesis
Meiosis 2
Cytokinesis
Term
What are gametes?
Definition
sex cells
Term
Where does crossing-over occur?
Definition
Prophase 1
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