Mitosis & Meiosis Review

You would be unlikely to see which of the following human cells dividng?Nerve cell Skin cellCancer cellCell from embryo

Question # 1

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

Sister chromatids ___________________.Are created when DNA is replicatedAre attached at the centromere prior to

divisionAre separated during mitosisAll of the above

Question # 3

If an intestinal cell in a grasshopper contains 24 chromosomes, a grasshopper sperm cell would contain ________ chromosomes.3612 48

Question # 4

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

A human somatic cell contains ________ chromosomes?234746n

Question # 6

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

The complex of DNA and protein that makes up a chromosome is properly called ____________.A chromatidA chloroplastChromatinChromoplast

Question # 8

The region of a chromosome holding two double strands of replicated DNA together is called ____________.A centromereA centrioleA chromatidAn aster

Question # 9

“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

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

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

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

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

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

During anaphase of mitosis _________________.The centromeres divideThe centrioles are at the opposite polesIdentical chromatids move to opposite polesAll of the above

Question # 16

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

In animal cell mitosis, the cleavage furrow forms during _______________.AnaphaseG1 phaseCytokinesisprophase

Question # 18

Which one of the following processes does NOT occur in dividing bacteria?MitosisReplication of DNASeparation of the origins of replicationBinary fission

Question # 19

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

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

Chromosomes of diploid organisms that are NOT involved in sex determination are called __________.AutosomesMitotic chromosomesHeterochromosomesnucleosomes

Question # 22

The egg (ovum) of a rabbit contains 22 chromosomes. How many chromosomes are in the somatic (body) cells of a rabbit?221144132

Question # 23

What is the typical result when a diplod cell undergoes meiosis?2 diplod cells2 haploid cells4 diploid cells4 haploid cells

Question # 24

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

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

At the end of telophase I of meiosis and cytokinesis, there are _____________.2 diploid cells2 haploid cells4 haploid cells4 diploid cells

Question # 27

Synapsis occurs during ______________.Prophase IAnaphase ICytokinesisProphase II

Question # 28

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

During anaphase I ________________.Homologues separate and migrate toward

opposite polesNuclei re-formSister chromatids separate and migrate toward

opposite polesThe cell is haploid

Question # 30

Regions of chromosomes where nonsister chromatids cross over are called ___________.ChiasmataKinetochoresCentromerescentrioles

Question # 31

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

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

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

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