Studied by 3 people
what is the cell cycle?
the cell cycle is the life of a cell from the time it is 1st formed from a dividing parents cell until its own division into 2 cells
what is cell division?
the reproduction of cells
what is the purpose of cell division?
growth, maintenance, and repair
what do single celled organisms produce?
identical daughter cells
what do multi celled organisms produce?
haploid reproductive cells
what is a genome?
a cells complete genetic information (DNA)
whose genomes differ?
prokaryotic and eukaryotic
what is the structure of a prokaryotes genome?
a single long DNA molecule
what is the structure of a eukaryotic genome?
several DNA molecules
each eukaryotic DNA molecule will:?
coil and form a chromosome
each eukaryotic DNA molecule contains __ to ____ of genes
100’s-1000’s
where can you find each species magic number of chromosomes?
somatic cell
somatic cells?
body cells, diploid, 2N
cells with a full set of chromosomes?
skin cells, muscle cells, nerve cells
are cells with a full set of chromosomes somatic cells?
yes
what are gametes
reproductive cells, haploid, 1N
gametes contain____ as many chromosomes as somatic
half
What are examples of gametes?
sperm or egg
how many chromosomes do each new life begin with?
46
reproductive cells are formed with ___ chromosomes
23
the cell cycle consists of…?
interphase and the mitotic phase
interphase is alternates with the ____?
M phase
interphase accounts for about ____ of the cell cycle
90%
interphase makes allows the cell to___?
grow, copies its chromosomes and prepare for division
G1- the cell grows:
by producing proteins and organelles
S- cell grows and ____
copies chromosomes
G2- cell grows more and____
completes preparation for division
time for M-phase
1hr
time for G1
5-6hrs
time for S-
10-12hrs
time for G2-
5-6hrs
centrosomes organize-
microtubules
sister chromosomes are identical copies of--
chromosomes bound to each other
Kinetochores are protein fibers--
attached to chromosomes and microtubules
kinetochores microtubules are attached to chromosomes and
centresomes; chromosomes “walk”along these toward poles
nonkinetochores microtubules are overlapping microtubules that
elongate the cell during anaphase
a cell goes
1-2, 2-4, 3-8, 4-16, 5-32
where does cell division spend the most time
the s phase
interphase includes:
G1, G2, S phases
1 hour of the m phase is ___%
4.17%
g1 phase and s phase is about
15-20 and 60-70
G2 phase in percent=
12-22
Note 
Flashcard (63)