Download chapter 4.3 notes

NAME:_____________________
CHAPTER 4.3 NOTES – CELL DIVISION
„ What is the cell cycle?
„ The ______________ sequence cells go through
„ What are daughter cells?
„ Result of when cells ______________.
„ Stage 1 – What is interphase?
„ Before Cell Division – NOT PART OF MITOSIS!
„ Cells grow, copy _____________ (mitochondria and
Chloroplasts) and prepare to divide
„ Chromatin is thick mass with a clear nucleus
„ What is replication?
„ Cells make an ____________ copy of _________________
„ Daughter cells have exact copies of DNA
„ What is STAGE 2 – MITOSIS?
„ Cells ________________ divides into two nuclei.
„ What are the 4 phases of Mitosis?
„ PMAT – ___________________, __________________,
____________________, ______________________. (Paul
Made Anna Tea) (Pizza Makes Anthony Tired)
1
NAME:_____________________
„ What is a chromosome?
„ Double rod structure of ____________________
„ Held together by a ___________________
„ Each rod = ____________________
„ What happens during Prophase?
„ _____________________ form
„ Centrioles move to __________________
„ _________________ fibers form
„ Nuclear envelope _____________________
„ What happens during Metaphase?
„ Chromosomes line up at the _____________________
„ Attach to spindle fibers at ____________________
„ What happens during Anaphase?
„ Centromeres ________________
„ Chromatids separate = new __________________
„ Cells stretches out
„ What happens during Telophase?
„ Chromosomes stretch out
„ Nuclear ____________________ forms
2
NAME:_____________________
„ What is STAGE 3 CYTOKINESIS?
„ Final stage of cell cycle – starts with _________________
„ ____________________ divides
„ Cell membrane pinches _______________ (animal Cells)
„ Cell plate forms (_______________ cells)
„ Two identical daughter cells created
THE CELL CYCLE
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NAME:_____________________
4.3 CELL DIVISION NOTES
„ Cell Division Occurs in a series of stages or phases.
1st Interphase
Chromatid
„ ______________________ are
copied (# doubles)
„ Chromosomes appear as threadlike
coils (_______________) at the start,
but each chromosome and its copy Centromere
(sister chromosome) change to sister
__________________ at end of this phase.
2ND PHASE - PROPHASE
„ Mitosis begins (cell begins to ____________)
„ Centrioles (or poles) appear and begin to
move to opposite ends of the cell.
„ ____________ fibers form between the poles
3RD PHASE – METAPHSE
„ Chromatids (or pairs of Chromosomes)
attach to the _____________ ______________.
„ Line up at the _________________.
4TH PHASE – ANAPHASE
„ _____________________ (or pairs of chromosomes)
separate and begin to move to opposite
ends of the cell.
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NAME:_____________________
5TH PHASE – TELOPHASE
„ Two new _____________________ form
„ Chromosomes appear as ___________________
(threads rather than rods)
„ Mitosis ends
6TH PHASE - CYTOKINESIS
„ Cell Membrane moves ________________ to create
two daughter cells – each with its own
nucleus with _______________ chromosomes.
„ Starts same time as telophase
„ Cell membrane pinches
inward (__________________ Cells)
„ Cell plate forms (_______________cells)
Look at
the two
new
daughter
cells!
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