Chapter 9 Flashcards
Prokaryotes = to
Binary fission
Unicellular eukaryotes go through….
mitosis and cytokinesis
multicellular eukaryotes go through …..
mitosis and cytokinesis
1 cell (zygote) is equal to
10 trillion cells
human development involves:
cell division
cell growth
cell migration
cell differentiation
apoptosis ( cell suicide)
in binary fission what happens?
- cell enlarges
- copy of chromosomes are made
- parent cells divide into daughter cells
- each daughter cell gets 1 copy of chromosomes
binary fission takes how long for e.coli
20 minutes
stages the eukaryotic cell cycle
- interphase: (g1 stage
s stage, g2 stage) - mitosis
- cytokinesis
G1 stage has what?
2 chromosomes of each type present
s stage prepares for….
cell division
identical copies of cells are called…
sister chromatids
what are sister chromatids held together by?
centromere
centrosome is…
organizing center for microtubules. (1 pair of centrioles — 2 pairs)
G2 stage is when?
before M phase and after DNA replication
how many chromosomes are present in the G2 stage?
4 chromosomes of each type
Mitosis (M phase) is what
the division of nucleus
stages within Mitosis
prophase
prometaphase
metaphase
anaphase
telophase
cytokinesis is….
division of cytoplasm
how long does it take for the human intestinal epithelial cell to go through the cell cycle?
12 hours
how long does it take for the human liver to go through the cell cycle?
1 year
onion root tip cell cycle takes how long?
20 hours
cells exit the cycle at ….
G1
cells enter a prolonged resting state called….
G0
no cell division occurs until…
the cell cycle resumes
cells may remain in G0 for…
any period of time
cytokinesis in animal cells forms what in the plasma membrane?
cleavage furrows (pinches apart the cells)
cell pinched in half along the cleavage furrow by…
microfilaments
cytokinesis in plant cells ….
vesicles are fused together along the metaphase plate (cell plate)
in plant cells going through cytokinesis cellulose is ….
deposited into tube to create a new cell wall.
