Interphase
What percent of the cycle cycle does this phase take up
90%
what is the purpose of the mitotic spindle
to separate duplicated chromosomes
True or False. Centrosomes are at the same pole
False
the organelle near the nucleus that contains the centrioles.
centrosomes
True or false
Four daughter nuclei form during these phases
False
- 2 nuclei form
all of a cell's genetic information (DNA)
what are sister chromatids
two duplicated copies of chromosomes join together
Where do chromosomes line up during this phase
Metaphase plate
True or False.
In this phase of the cell cycle the cell shortens
false
- it elongates
a ring-shaped structure that helps separate one cell into two cells
contractile ring
DNA _________ and chromosome _______ occurs in the ______ phase
replication, duplication, s "synthesis"
define centromere
the region on each sister chromatid where they are most closely attached
microtubules are attached to each __________
kinetochore
hollow rod-like structures made of the protein tubulin
microtubules
Cytokinesis occurs in plants. Tell me about it
the vesicles produced by the Golgi travel to the middle of the cell and form a cell plate
what occurs in the G2 phase
final growth and preparation for mitosis
Name 3 key events that occur in this phase
- chromatin condenses
- nucleoli disappear
- duplicated chromosomes appear as sister chromatids
- mitotic spindle begins to form
- centrosomes move away from each other
what phase occurs in between prophase and metaphase? what events happen in this phase
1) nuclear envelope fragments
2) microtubules enter nuclear area and some attach to kinetochores
pairs of matching chromosomes
homologous chromosomes
cytokinesis occurs in animals. tell me about it
A cleavage furrow appears due to contractile ring of actin filaments
In which phase does the cell grow and carry out normal functions
G1 "first gap" phase
Define Kinetochore
proteins attached to the centromere that link each sister chromatid to the mitotic spindle
an imaginary line that is equidistant from the two poles
metaphase plate
what happens to sister chromatids during this phase of the cell cycle? And why does this occur
Sister chromatids separate and move to opposite ends of the cell due to the microtubules shortening
- two daughter nuclei form
-nucleoli reappear
- chromosomes become less condensed