you would be unlikely to see which of the following human cells dividng? nerve cell skin cell cancer...
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Mitosis & Meiosis Review
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You would be unlikely to see which of the following human cells dividng?Nerve cell Skin cellCancer cellCell from embryo
Question # 1
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The person credited with first recognizing that living cells cannot arise spontaneosuly, but arise only from previously exisitng cells is ____________________.Louis PasteurRobert HookeAnton van LeeuwenhoekRudolf Virchow
Question # 2
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Sister chromatids ___________________.Are created when DNA is replicatedAre attached at the centromere prior to
divisionAre separated during mitosisAll of the above
Question # 3
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If an intestinal cell in a grasshopper contains 24 chromosomes, a grasshopper sperm cell would contain ________ chromosomes.3612 48
Question # 4
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Mitosis & cytokinesis result in the formation of _______________; meiosis & cytokinesis result in the formation of _________________.4 diploid cells … 4 haploid cells2 diploid cells … 4 haploid cells2 diploid cells … 2 diploid cells4 haploid cells … 2 diploid cells
Question # 5
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A human somatic cell contains ________ chromosomes?234746n
Question # 6
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The function of the cell cycle is to produce daughter cells that ____________.Have the same number of chromatids as the
parent cell had chromosomesHave a random assortment of maternal and
paternal chromosomesHave the same number of chromosomes as the
parent cell but not the same genetic information
Are genetically identical to parent cell (assuming no mutation has occurred)
Question # 7
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The complex of DNA and protein that makes up a chromosome is properly called ____________.A chromatidA chloroplastChromatinChromoplast
Question # 8
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The region of a chromosome holding two double strands of replicated DNA together is called ____________.A centromereA centrioleA chromatidAn aster
Question # 9
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“Cytokinesis” refers to _______________.Division of the entire cellDivision of the nucleusDivision of the cell outside the nuclear materialReduction in the number of chromosomes
Question # 10
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If a cell contains 60 chromatids at the start of mitosis, how many chromosomes will be found in each daughter cell at the completion of the cell cycle?15304560
Question # 11
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A biochemist measured the amount of DNA in cells growing in the laboratoy and found that the quantity of DNA in a cell doubled _______________.Between prophase and anaphaseDuring the M phase of the cell cycleBetween the G2 phase and prophaseBetween G1 and G 2 phases
Question # 12
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DNA replication occurs ______________.In prophase of both mitosis and meiosisIn metaphase of meiosis onlyIn the S phase of interphase in both somatic
and reproductive cellsIn the cytokinesis portion of the cell’s life cycle
Question # 13
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At which point in the cell cycle do centrosomes begin to move apart to two poles of the cell in a dividing human liver cell?S phaseProphaseMetaphaseAnaphase
Question # 14
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One event occurring during prophase is ___________.The synthesis of a new nuclear envelope.CytokinesisThe beginning of the formation of a spindle
apparatusDivision of the centromere
Question # 15
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During anaphase of mitosis _________________.The centromeres divideThe centrioles are at the opposite polesIdentical chromatids move to opposite polesAll of the above
Question # 16
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Which of the following represents a mismatch or incorrect description?Prophase: chromosomes become more tightly
coiledAnaphase: there is movement of the
chromosomes to the polesMetaphase: the nuclear envelope disappearsTelophase: chromosomes become more
extended
Question # 17
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In animal cell mitosis, the cleavage furrow forms during _______________.AnaphaseG1 phaseCytokinesisprophase
Question # 18
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Which one of the following processes does NOT occur in dividing bacteria?MitosisReplication of DNASeparation of the origins of replicationBinary fission
Question # 19
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During binary fission in a bacterium ____________.The 2 DNA molecules divide in half to form 4
DNA fragmentsThe origins of replication move apartThe 2 DNA molecules attach to the centriolesThe 2 DNA molecules break up into plasmids
Question # 20
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The function(s) of meiosis is (are) ______________.Decreases the chromosome number to haploidIntroduce genetic variability into the daughter
cellsEnsure that each daughter cell get a single
copy of each cell’s chromosomesAll of the above
Question # 21
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Chromosomes of diploid organisms that are NOT involved in sex determination are called __________.AutosomesMitotic chromosomesHeterochromosomesnucleosomes
Question # 22
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The egg (ovum) of a rabbit contains 22 chromosomes. How many chromosomes are in the somatic (body) cells of a rabbit?221144132
Question # 23
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What is the typical result when a diplod cell undergoes meiosis?2 diplod cells2 haploid cells4 diploid cells4 haploid cells
Question # 24
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A karyotype is _______________.The physical traits a person hasA photograph of all a person’s chromosomesA list of all the genes a person carriesAll the possible gametes a person could
produce
Question # 25
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Two chromosomes in a nucleus that carry genes for the same traits in the same loci, but specify different versions of the same traits, are called _____________.Chromatic chromosomesSister chromatidsHomologous chromosomesDifferentiated chromosomes
Question # 26
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At the end of telophase I of meiosis and cytokinesis, there are _____________.2 diploid cells2 haploid cells4 haploid cells4 diploid cells
Question # 27
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Synapsis occurs during ______________.Prophase IAnaphase ICytokinesisProphase II
Question # 28
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During anaphase II ________________.Chromosomes line up in one planeSister chromatids separate and migrate toward
opposite polesNuclei re-formHomologues separate and migrate toward
opposite poles
Question # 29
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During anaphase I ________________.Homologues separate and migrate toward
opposite polesNuclei re-formSister chromatids separate and migrate toward
opposite polesThe cell is haploid
Question # 30
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Regions of chromosomes where nonsister chromatids cross over are called ___________.ChiasmataKinetochoresCentromerescentrioles
Question # 31
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Which one of the following occurs in meiosis, but not mitosis?The cells formed have the same combination of
genes as found in the initial cellHomologous chromosomes separateThe nuclear envelope disappearsA spindle apparatus forms
Question # 32
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Mitosis and meiosis differ in several ways. Meiosis, but not mitosis, _____________________.Changes the chromosome number of the
daughter cellsResults in 4 (rather than 2) daughter cellsInvolves 2 bouts of cell divisionIs correctly described by all of these
statements
Question # 33
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Why is crossing over important?It prevents variation in gametesIt is necessary for the attachment of
chromosomes to the spindleIt ensures that homologous chromosomes pairIt allows the exchange of genes between
homologous chromosomes
Question # 34
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Meiosis is more complicated than mitosis because it carries our more complicated functions. Meiosis must __________________.Undergo 2 rounds of cytokinesisDecrease the chromosome number to haploidEnsure that each daughter cell gets a complete
set of chromosomesIntroduce genetic variation among the
daughter cells
Question # 35