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Cell Cycle
N/A
26
Biology
Undergraduate 1
11/11/2008

Additional Biology Flashcards

 


 

Cards

Term
Cell Cycle
Definition

Interphase (90%): G1, S, G2; growth, synthesis. prepartion

Mitosis (10%): division of nucleus and cytokinesis

 

Term
chromosomes
Definition

coiled DNA

Term
Chromatin
Definition
uncoiled DNA
Term
Chromatid
Definition
single strand of DNA
Term

Karotype

Definition
chromosomal arrangement of a cell
Term
Somatic Cells
Definition
Body Cells
Term
homologous chromosome
Definition
matching chromosomes (each inherited from one parents)
Term
centromere
Definition
the point where two chromatids are attached
Term
gametes
Definition
sexual haploid cells
Term
sister chromatids
Definition
identical copies of a chromosome
Term
spindle apparatus
Definition
microtubules connected to centrosome via kinectochore
Term
kinetochore
Definition
structure around centrosome
Term
autosome
Definition
diploid body cell
Term
diploid cell
Definition

2 complete sets of chromosomes (2N)

Term
haploid cells
Definition
one complete set of chromosomes (N)
Term

Zygote

Definition

single cell

 

all humans start out as zygote

 

formed by uniting sperm and egg

Term
Why do cells divide?
Definition

in humans; cells specialize for specific bodily functions thus the original cell must divide to account for all the "jobs"

 

ALSO: they are too small!

Term
Gap 1 (G1)
Definition

the growth phase

 

most cells are found in this phase

Term
Synthesis (S)
Definition
new DNA is synthesized
Term
Gap 2 (G2)
Definition
final preparations for division are made
Term
Mitosis
Definition

division of the cell

 

during mitosis; an exact copy of the genetic material in the "mother" cell must be distributed to each "daughter" cell

Term
Prophase
Definition

DNA that is spread all over the nucleus is coiled and condensed (sister chromatids)

 

nuclear membrane disapears

 

miotic spindle forms

 

centrosomes

 

 

 

Term
Metaphase
Definition

Condensed chromosomes line up across the middle of the cell: the metaphase plate

 

centrosomes=at poles

Term
Anaphase
Definition
One copy of each chromosome moves to each pole of the cell
Term
Telophase
Definition

END STAGE:

nuclear membranes are formed around the chromsomes and cytokinesis beings; forming two daughter cells

Term
Cyclin
Definition
series of proteins that fluctuate concentration during the cell cycle and help regulate by binding to a kinase
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