ch9 - how cells reproduce
A parent cell with 12 chromosomes will produce daughter cells with _____ chromosomes by mitosis.
12
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. after telophase II in meiosis is complete
23
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. metaphase II
23
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. telophase II
23
A chicken somatic cell carries 78 chromosomes. A chicken sperm cell will contain how many chromosomes?
39
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. G1
46
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. after telophase in mitosis is complete
46
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. prophase II
46
G1
46 chromosomes
after telophase in mitosis is complete
46 chromosomes
At the beginning of prophase I, there are _____ chromosomes in the germ cell that will develop into a human sperm cell.
92
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. G2
92
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. Metaphase
92
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. S
92
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. anaphase I
92
Match the correct number of chromosomes to the stage of mitosis or meiosis for a human cell. Each answer choice may be used more than once or not at all. prophase I
92
G2
92 chromosomes
S
92 chromosomes
metaphase
92 chromosomes
prophase
92 chromosomes
Which list correctly describes the sequence of events that occurs during cell division, beginning at interphase?
DNA replication; nuclear division; cytoplasmic division
Chromosomes are unduplicated during which phase of cell cycle?
G1
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. phase during which the cell prepares for DNA replication
G1
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. phase in which chromatids are not connected by centromeres
G1
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. the beginning of interphase
G1
A cell cycle checkpoint at which phase would ensure sufficient nutrients for cell division were available?
G1 or G2
Which phases comprise interphase?
G1, S, and G2
In what phase of the cell cycle does an actively dividing cell produce the proteins necessary for mitosis?
G2
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. period prior to mitosis
G2
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. phase that follows DNA replication
G2
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. this is the last stage of interphase
G2
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. when DNA is replicated
S
The cells of which individual do not have 23 pairs of homologous chromosomes?
a male
Meiosis may pause at which point in the cycle? after DNA is replicated in S phase but before meiosis I begins after meiosis I is complete after prophase II before telophase II after prophase I
after meiosis I is complete
Alternative or different forms of the same gene are called _____. homozygous chromatids alleles homologous karyotypes
alleles
Examine the micrographs below to answer the following question. The cell in micrograph "III" is at which stage of the cell cycle?
anaphase
Sister chromatids detach from one another and become visibly separate chromosomes during _____.
anaphase
Which organisms replicate cells by mitosis? animals and bacteria animals and plants bacteria and plants archaea and bacteria archaea and plants
animals and plants
An important advantage of sexual reproduction is related to _____. increasing production of offspring avoiding predators avoiding harmful mutations producing offspring identical to the parents having two sexes
avoiding harmful mutations
Abnormal cell division that does not pose a threat to surrounding tissues is termed _____.
benign
The phase of the cell cycle during which cytoplasmic division occurs is _____.
cytokinesis
Cells with two of each kind of chromosome are _____. aneuploid diploid triploid haploid tetraploid
diploid
After meiosis, resulting daughter cells will contain _____. the same number of chromosomes as the parent cell half the number of chromosomes than the parent cell carries twice the number of chromosomes than the parent cell carries three times the number of chromosomes than the parent cell carries four times the number of chromosomes than the parent cell carries
half the number of chromosomes than the parent cell carries
The HeLa cell line was isolated from a _____.
human
In what phase of the cell cycle does a typical cell spend most of its life?
interphase
Match the following terms to the correct statements. crossing over occurs
meiosis
Match the following terms to the correct statements. homologous chromosomes are separated during an anaphase event
meiosis
Match the following terms to the correct statements. involves two nuclear divisions
meiosis
Chromosomes are aligned at the middle of the cell during _____.
metaphase
Paired homologous chromosomes are found at the center of the cell during _____ of meiosis.
metaphase I
The spread of cancer cells from one site to others in the body is known as _____.
metastasis
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. nuclear division
mitosis
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. period in which metaphase occurs
mitosis
Match the cellular process to the correct phase of the eukaryotic cell cycle. Each question has only one best answer but answer choices may be used more than once. phase that precedes cytoplasmic division
mitosis
Match the following terms to the correct statements. in plants, gametes result from this process
mitosis
Which cells are least likely to proceed into G1? most skin cells most liver cells most intestinal cells most red blood cells most nerve cells
most nerve cells
New alleles arise by _____.
mutation
During which phase of meiosis will the chromosomes appear as a unit of four chromatids?
prophase I
The pairing of chromosomes and crossing over occur during _____ of meiosis. metaphase I anaphase II prophase I prophase II more than one of these
prophase I
Meiosis is the basis for _____.
sexual reproduction
Examine the micrographs below to answer the following question. The cell in micrograph "II" is at which stage of the cell cycle?
telophase
In which phase of mitosis do chromosomes arrive at opposite sides of the cell?
telophase
The cell in micrograph "II" is at which stage of the cell cycle?
telophase
Which of the following occurs in prophase? sister chromatids attach DNA replicates chromosomes align in the middle of the cell the nuclear envelope breaks down sister chromatids separate
the nuclear envelope breaks down
Accumulations of cells that divide uncontrollably are called ______.
tumor
The cell plate in dividing plant cells is composed of _____. microfilaments the cytoplasmic membrane vesicles with wall-building materials Golgi bodies microtubules
vesicles with wall-building materials
The fusion of egg and sperm cells results a(n) _____.
zygote
A chicken has 78 chromosomes. A chicken cell will contain _____ chromosomes at the beginning of prophase and _____ chromosomes after mitotic division is complete.
156; 78
In a human cell, there are _____after DNA replicates during S phase.
92 chromosomes and 46 pairs of sister chromatids
During S phase, _____. chromosomes condense the cell produces proteins in preparation for mitosis the cytoplasm begins to divide DNA is replicated sister chromatids separate from each other
DNA is replicated
Which of the following is the proper sequence for mitosis? I. metaphase II. telophase III. prophase IV. anaphase
III, I, IV, II
How do microtubules separate chromosomes during anaphase? Microtubules pull chromosomes to opposite poles of the cell. Microtubules push chromosomes to opposite poles of the cell. Microtubules push and pull chromosomes to separate poles of the cell. Microtubules attach to telomeres and pull chromosomes to opposite poles of the cell. Microtubules attach to telomeres and push chromosomes to opposite poles of the cell.
Microtubules push and pull chromosomes to separate poles of the cell.
Which statement describes the function of telomeres? Telomeres are DNA segments that encode cell cycle checkpoint proteins. Telomeres are where DNA polymerase binds to initiate DNA replication. Telomeres serve as attachment points where microtubules bind to separate chromosomes during anaphase. Telomeres are added to chromosomes with each round of replication to increase DNA stability. Telomeres protect the coding regions of chromosomes because chromosomes are shortened with each round of replication.
Telomeres protect the coding regions of chromosomes because chromosomes are shortened with each round of replication.
Which event occurs during interphase?
The cell doubles its cytoplasmic contents.
Which of the following is/are essential for formation of the cleavage furrow during cytoplasmic division in animal cells? a contractile ring Golgi body vesicles ATP molecules a contractile ring and Golgi body vesicles a contractile ring and ATP molecules
a contractile ring and ATP molecules
Sister chromatids separate during _____ of mitosis and _____ of meiosis.
anaphase; anaphase II
Immortal cell lineages _____.
are derived from cancerous cells
Mutations in genes that control _____ are likely to cause cancer.
cell cycle checkpoints
HeLa cells were critical in _____.
developing the polio vaccine
Tumor suppressor genes _____.
encode proteins that inhibit mitosis
Meiosis in a diploid organism typically produces _____.
four haploid cells
When viewing a cell culture under a microscope, most cells would be in which phase of cell cycle?
interphase
An oncogene is a _____.
mutated gene that results in tumor growth
Asexual reproduction _____.
produces genetic clones
Crossing over is one of the most important events in meiosis because it _____.
produces new combinations of alleles on chromosomes
The spindle apparatus appears during _____.
prophase
Sexual reproduction _____.
results in new combinations of genetic traits
Pairs of duplicated chromosomes produced during S phase are called ______.
sister chromatids
Meiosis II is similar to mitosis because _____.
sister chromatids are separated in meiosis II and mitosis
Meiosis produces _____.
sperm and egg cells
In mitosis, _____.
the chromosome number stays the same
A cell cycle checkpoint for S phase would likely inhibit progression through the cell cycle if _____.
there is DNA damage