Download Wednesday, September 5

Chapter 12
The Cell Cycle
Chapter 12
The Cell Cycle
Concept Check Questions
Chapter 12
The Cell Cycle
Starting with a fertilized egg
(zygote), a series of five cell
divisions would produce an early
embryo with how many cells?
Chapter 12
The Cell Cycle
Starting with a fertilized egg
(zygote), a series of five cell
divisions would produce an early
embryo with how many cells?
5
2
= 32
Chapter 12
The Cell Cycle
How many chromatids are in a
duplicated chromosome?
Chapter 12
The Cell Cycle
How many chromatids are in a
duplicated chromosome?
2
Chapter 12
The Cell Cycle
A chicken has 78 chromosomes in its
somatic cells; how many chromosomes
did the chicken inherit from each parent?
How many chromosomes are in each of
the chicken’s gametes? How many
chromosomes will be in each somatic cell
of the chicken’s offspring? How many
chromosomes are in a “set”?
Chapter 12
The Cell Cycle
A chicken has 78 chromosomes in its
somatic cells; how many chromosomes
did the chicken inherit from each parent?
How many chromosomes are in each of
the chicken’s gametes? How many
chromosomes will be in each somatic cell
of the chicken’s offspring? How many
chromosomes are in a “set”?
39
39
78
39
Chapter 12
The Cell Cycle
During which stage of a cell cycle
would a chromosome consist of two
identical chromatids?
Chapter 12
The Cell Cycle
During which stage of a cell cycle
would a chromosome consist of two
identical chromatids?
The end of S through
the end of metaphase
Chapter 12
The Cell Cycle
Compare cytokinesis in plant cells
and animal cells.
Chapter 12
The Cell Cycle
Compare cytokinesis in plant cells
and animal cells.
cleavage furrow
vs.
cell plate
Chapter 12
The Cell Cycle
What is a function of nonkinetochore
microtubules?
Chapter 12
The Cell Cycle
What is a function of nonkinetochore
microtubules?
Elongate the cell
during anaphase
Chapter 12
The Cell Cycle
Identify three similarities between
bacterial chromosomes and
eukaryotic chromosomes,
considering both structure and
behavior during cell division.
Chapter 12
The Cell Cycle
Identify three similarities between
bacterial chromosomes and
eukaryotic chromosomes,
considering both structure and
behavior during cell division.
•Single molecule of DNA with proteins
•Many times longer than cell
•Two copies actively move apart
•One copy goes to each daughter cell
Chapter 12
The Cell Cycle
A researcher treats cells with a
chemical that prevents DNA
synthesis. This treatment traps the
cells in which part of the cell cycle?
Chapter 12
The Cell Cycle
A researcher treats cells with a
chemical that prevents DNA
synthesis. This treatment traps the
cells in which part of the cell cycle?
G1
Chapter 12
The Cell Cycle
What is the go-ahead signal for a cell
to pass the G2 phase checkpoint
and enter mitosis?
Chapter 12
The Cell Cycle
What is the go-ahead signal for a cell
to pass the G2 phase checkpoint
and enter mitosis?
MPF
Chapter 12
The Cell Cycle
What phase of the cell cycle are
most of your body cells in?
Chapter 12
The Cell Cycle
What phase of the cell cycle are
most of your body cells in?
G0
Chapter 12
The Cell Cycle
Compare and contrast a benign
tumor and a malignant tumor.
Chapter 12
The Cell Cycle
Compare and contrast a benign
tumor and a malignant tumor.
•Both are abnormal cells
•Benign stays at original site
•Benign can be removed
•Malignant impairs organ function
•Malignant spreads via metastasis.
.