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Bio 400
ch.12
22
Biology
Undergraduate 2
03/25/2017

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Term
cell division
Definition
process of cellular reproduction
parent cell splints into daughter cells
Term
Daughter cells
Definition
inherit the parents chromosomes
Term
genome
Definition
all the cell's inheritable info in its DNA
Term
histones
Definition
DNA binding proteins that condense DNA into coils
Term
DNA Replication
Definition
process that copies each DNA molecule before cell division
Term
duplicated chromosomes
Definition
created by DNA replication, 2 identical DNA double helices (sister chromatids) attached to each other
Term
centromere
Definition
structure that attaches the chromatids, narrow part, splits off into daughter chromosomes
Term
interphase
Definition
first phase of cell cycle, 3 phases: G1, S, G2
Term
G1 phase
Definition
gap 1, cell grows
Term
S phase
Definition
synthase, DNA replicated, first committed step to divide
Term
G2 phase
Definition
gap 2, cell prepares for mitosis
Term
Mitotic phase
Definition
2nd phase of cell cycle, including mitosis and cytokinesis
Term
mitosis
Definition
divide nucleus, nuclear divison
Term
prophase
Definition
chromosomes condense/ coil, centrosomes migrate to opposite poles, formation of mitotic spindle, coordinate chromosome movement
Term
pro metaphase
Definition
crazy stage, nuclear envelope fragments break up, microtubules attach to the kinetochore
Term
metaphase
Definition
OCD line up, chromosomes line up at the cells equilateral plane
Term
anaphase
Definition
start separating, daughter chromosomes form as chromatids separate, kinesis motor proteins pull chromosomes to the poles
Term
telophase
Definition
almost apart, daughter chromosomes reach opposite poles, nuclear envelope reforms
Term
cytokinesis
Definition
cytoplasmic divison, 2 mechanisms: cleavage and cell plate formation
Term
cleavage
Definition
animal cell mechanism, furrow forms around center and deepens until cell separates
Term
cell plate formation
Definition
plant cell mechanism, cell wall and membrane are built from the inside out
Term
Binary Fission
Definition
prokaryote cell division, circular chromosome replicated, daughter chromosomes separate, cytoplasm divides
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