mitosis Flashcards
what are the two stages in the cell cycle?
interphase
mitosis
what does interphase consist of?
g1-rapid growth, centriole replicates
s-DNA replicates
g2-final growth, mitotic phase begins
what are the stages of mitosis?
prophase
metaphase
anaphase
telophase and
cytokenisis
how does the cell divide?
by the stages of mitosis
what is prophase?
the first stage of the mitotic phase
what happens in prophase?
chromatin fibers tightly coil to become chromosomes
the nuclear envelope fragments
mitotic spindles develope from microtublues
polar fibers extend from each centriole
what happens in metaphase?
the centrioles move to opposite ends of the cell
chromosomes align themselves on the meta plate
chromosomes lie in the center in a single file line
what happens in anaphase?
the paired chromatids move apart
each chromatid is now its own chromosome
what happens in telophase?
the polar fibers contract
the nuclear envelope forms
a cleavage furrow pinches in
chromosomes uncoil
cytokenisis begins
what happens in cytokenisis?
it begins to divide forming two identical daughter cells from the cytoplasm
DNA is copied in what phase?
interphase
when do spindle fibers form?
prophase
the number of organelles increase in what phase?
cytokenisis
when do chromosomes line in the middle?
metaphase
what does the cell cycle consist of?
all the stages of mitosis, list them
how many cells are produced in mitosis?
two
what stage does the cell spend most of its life?
interphase
A protein called p53 can keep cells from dividing. To prevent cell division, this protein most likely stops ___________.
mitosis
When the DNA in a cell is uncoiled and spread throughout the nucleus, this process is called chromatin. State true or false.
true
The spindle fibers are produced by the ________.
centrioles
Cleavage furrows form in which type of cells?
animal cell
why is it important to replicate DNA?
in order for genetic information to be transferred into daughter cells
