Cell cycle Flashcards
Sequential phases of events wherein the parent cell divides and replicates DNA materials to produce two daughter cells.
Cell cycle
Purposes of cell cycle
Growth, cell differentiation, repair of damaged tissues, replication of genetic materials, reproduction
2 Types of Cell Division
Mitosis and meiosis
The sister chromatids are moving apart
Anaphase
A five-stage process of cell division solely
for eukaryotic cells wherein the replicated
traits of the chromosomes separate into
two new nuclei
Mitosis
Chromatin of the nucleus
condensing to form
chromosomes.
Prophase
It is the transition stage
wherein the nuclear envelope
breaks down causing
interaction of the spindle and
the chromosomes to form
spindle fibers that will then
bind with the kinetochore of
the centromere.
Prometaphase
Occurs after the spindle
fibers have attached to
the kinetochores, from
whence they begin
moving to the center poles
to eventually align with
the metaphase plate
Metaphase
Sees the shortening of
the microtubules of the
kinetochores thereby
pulling the pair of
chromatid sisters towards
the opposite poles
Telophase
It is a two-round set of cell division stages
occurring solely among eukaryotic cells
with gametes.
Meiosis
Its end result shall be the reduction of
chromosome number into half.
Meiosis
Involves the sorting and pairing up of
homologous chromosomes (genes with
similar traits) from both male parent and
female parent resulting to a thick four-
strand tetrad of two diploid cell
Meiosis I
Sees homologous
chromosomes from both
parents pairing up into
tetrads (synapsis) and
exchanging DNA (homologous
recombination) resulting
in crossovers of new
combination of alleles
Prophase I
It consists of
homologous pairs
moving together and
aligning with the
metaphase plate.
This stage also sees a
protein substance
called
cohesin binding
the replicated sister
chromatids.
Metaphase I
During this phase,
the homologous
chromosomes move
to opposite ends of
the cell.
Anaphase I