CLICKERS Mitosis Meiosis Combined

CLICKERS Mitosis Meiosis combined

1In sexually reproducing species, the chromosome number remains stable over timebecause _____ and
_____ always alternate.

Ameiosis ... fertilization

Bmeiosis ... mitosis

Cmitosis ... fertilization

Dmeiosis ... interphase

Emeiosis I ... meiosis II

2How many pairs of autosomes do humans have?

A23

B22

DIt depends on the sex of the individual

3Which of the following statements about homologous chromosomes is correct?

AThey are found in animal cells but not in plant cells

BThey have genes for the same traits at the same loci.

CThey pair up in prophase II

DThey are found in haploid cells

EThey are found in the cells of human females but not in human males.

4When we say that an organism is haploid, we mean that ______.

Aits cells each have one chromosome

Bit has one half of a chromosome

Cits cells have a single set of chromosomes

Dits cells have two sets of chromosomes

Enone of the above

5Spores and gametes are different in that ______

Agametes never resemble spores morphologically

Bgametes are always haploid while spores are diploid

Cgametes can fuse to form a zygote, but spores can develop into independentorganisms without
first forming a zygote

Donly the formation of gametes contributes to genetic variation

Egametes are derived directly from sporophytes to form gametophytes

6Somatic cells in humans contain ______set(s) of chromosomes and are therefore termed______.

Aone . . . diploid

Btwo . . . haploid

Cone . . . haploid

Dtwo . . . diploid

Ethree . . . triploid

7The egg (ovum) of a rabbit contains 22 chromosomes. How many chromosomes are in thesomatic (body)
cells of a rabbit?

A11

B22

C44

D88

E132

8At the end of telophase I of meiosis and cytokinesis, there are _____

Afour haploid cells

Btwo diploid cells

Cfour diploid cells

Done haploid ovum and three polar bodies

Etwo haploid cells

9Synapsis occurs during ______

Aanaphase I

Bprophase I

Ccytokinesis

Dprophase II

Emetaphase I

10During anaphase I ______

Ahomologues separate and migrate toward opposite poles

Bsister chromatids separate and migrate toward opposite poles

Cnuclei reform

Dchromosomes line up in one plane

Ethe cell is haploid

11Crossing over occurs during ______

Acytokinesis

Bmetaphase I

Cprophase II

Dmetaphase II

Eprophase I

12Regions of chromosomes where nonsister chromatids cross over are called ______.

Ainversions

Bhomologues

Ckinetochores

Dchiasmata

Etetrads

13In a male mammal, every cell that undergoes meiosis gives rise to ____ sperm.

Aone

Btwo

Cfour

Dno set number

Ezero

14Which function below makes meiosis more complicated than mitosis?

Adecreasing the chromosome number to haploid

Bintroducing genetic variation among the daughter cells

Censuring that each daughter cell gets a single, complete set of chromosomes

Dundergoing two round of cytokinesis

Eall of the above

15Which of the following does NOT contribute to genetic variation in sexually reproducingspecies?

Acrossing over

Bindependent assortment

Crandom fertilization

Dcytokinesis

Esegregation

16In humans, the haploid number of chromosomes is 23. Independent assortment has thepossibility of
producing ____ different types of gametes.

A232
B1 million
C223
D24
E100,000

17The diploid number of chromosomes in a certain animal is 8 (2n=8). How do the four pairsof homologous
chromosomes align and separate during meiosis?

AAll of the maternal chromosomes always move to one pole, and all thepaternal chromosomes
always move to the other pole

BAll 16 chromatids move together

CExactly two maternal and two paternal chromosomes always move to eachof the two poles

DThe first to move influences all the other

EThey align and assort independently to form any of 16 differentcombinations

18Which of the following is a reason cells undergo meiosis?

Arepair injuries

Bgrowth of organism

Cproduce gametes

Dreplace worn out cells

19Which of the following is TRUE about crossing over?

ACrossing over happens in spermatogenesis but not oogenesis.

BCrossing over happens in mitosis but not meiosis

CCrossing over happens during prophase II

DThe farther apart gene loci are the more likely crossing over will occur

EThe farther apart gene loci are the less likely crossing over will occur

20Bacteria reproduce using ______

Ameiosis

Bbinary fission

Csexual reproduction

Drandom fertilization

Ebudding and regeneration

21All of the following happen in meiosis but not mitosis EXCEPT ______

Asegregation

Bcrossing over

Cindependent assortment

DDNA synthesis during interphase II

Esynapsis

22Independent assortment happens during ______of meiosis.

AProphase I

BProphase II

CAnaphase I

DAnaphase II

ETelophase I

23Sperm and eggs could also be called ______.

Apolar bodies

Bspores

Cdiploid cells

Dsomatic cells

Egametes

24After telophase I of meiosis, the chromosomal makeup of each daughter cell is ______.

Adiploid and chromosomes are composed of a single chromatid

Bdiploid and the chromosomes are composed of two chromatids

Chaploid and the chromosomes are composed of a single chromatid

Dhaploid and the chromosomes are composed of two chromatids

Etetraploid and the chromosomes are composed of tetrads

25In animals______are produced by mitosis and ______are produced by meiosis.

Asomatic cells ; gametes

Bspores ; gametes

Cgametes ; somatic cells

Dzygotes ; gametes

Ehaploid cells ; diploid cell

26In plants, gametes are produced by ______and spores are produced by ______.

Ameioisis ; mitosis

Bmitosis ; meiosis

Cfertilization ; binary fission

Dmitosis ; fertilization

Emeiosis ; budding

Mitosis Meiosis combined Page 6

Answer Key :Mitosis Meiosis combined

Question:Answer

10A

11E

12D

13C

14E

15D

16C

17E

18C

19D

20B

21D

22C

23E

24D

25A

26B

11/20/2014 10:27:00 AM