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The process by which a bacterium uses a sex pilus to transfer genetic information to another bacterium is


A) conjugation.
B) replication.
C) apomixis.
D) mitosis.
E) parthenogenesis.

F) C) and D)
G) B) and D)

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A male having an extra X chromosome (XXY)would have Turner syndrome.

A) True
B) False

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Sexual reproduction is important to the survival of a species in a changing environment because


A) sexual reproduction requires only one individual to survive and produce germ cells.
B) All of the answer choices are correct.
C) sexual reproduction requires less overall energy expenditure than asexual reproduction.
D) sexual reproduction produces genetically identical individuals.
E) sexual reproduction produces genetically variable individuals in the population.

F) C) and E)
G) A) and B)

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In meiosis I,cytokinesis usually occurs after telophase I and produces


A) one diploid cell.
B) four haploid cells.
C) two haploid cells.
D) two diploid cells.
E) one haploid cell.

F) C) and E)
G) A) and E)

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Identify the correct comparison between the human X and Y chromosomes.


A) The X chromosome is larger than the Y chromosome.
B) Only the Y chromosome is always found without a homologous match.
C) Only the X chromosome is paired with a homologous match in human females.
D) Although both are sex chromosomes, they do not share the same genes.
E) All of the answer choices are correct.

F) B) and D)
G) All of the above

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If a diploid sperm fertilizes a diploid egg it will produce a ____ zygote.


A) triploid
B) tetraploid
C) hexaploid
D) diploid
E) haploid

F) B) and E)
G) C) and D)

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A species has 6 chromosome pairs in each diploid cell.How many genetically unique gametes could be produced from sexual reproduction in this species,accounting only for independent assortment?


A) 16
B) 64
C) 9
D) 36
E) 8

F) B) and E)
G) A) and B)

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You have an opportunity in biology lab to observe the prepared,stained karyotypes of a stallion,a mare,and their foal offspring horses.Banding patterns of some of the autosomes from the foal match those of the stallion,while others from the foal match those of the mare.This variability is produced in meiosis due to


A) mutation.
B) non-random fertilization.
C) semi-conservative replication.
D) random fertilization.
E) random alignment of chromosome pairs.

F) D) and E)
G) C) and D)

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The abbreviation n indicates that a cell is


A) somatic cells.
B) autosomes.
C) diploid.
D) the X and Y chromosomes.
E) haploid.

F) A) and C)
G) A) and E)

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Figuer: Figuer:    -Based on the figure,T.mirus would normally produce gametes with __ chromosomes. A)  2 B)  12 C)  6 D)  24 E)  1 -Based on the figure,T.mirus would normally produce gametes with __ chromosomes.


A) 2
B) 12
C) 6
D) 24
E) 1

F) D) and E)
G) None of the above

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In meiosis,homologous chromosomes separate during


A) anaphase II.
B) metaphase I.
C) anaphase I.
D) prophase I.
E) prophase II.

F) B) and D)
G) A) and B)

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In humans,the egg provides the mitochondria to the zygote.In plants which organelles would be provided by the egg and not by the sperm?


A) chloroplasts and mitochondria
B) mitochondria
C) nuclei and chloroplasts
D) chloroplasts
E) nuclei

F) A) and E)
G) B) and E)

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In plants,sporophytes undergo meiosis to produce ____ spores.


A) triploid
B) tetraploid
C) haploid
D) diploid
E) fertilized

F) D) and E)
G) C) and D)

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A diploid cell with 4 chromosomes would produce which of the following after meiosis,assuming variability occurred due to crossing over or other abnormalities in the process?


A) four genetically identical diploid gametes
B) two genetically distinct types of haploid gametes
C) two genetically distinct types of diploid gametes
D) four genetically distinct types of haploid gametes
E) four genetically distinct types of diploid gametes

F) All of the above
G) A) and D)

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If a sperm cell combines with an egg cell,then the result is a


A) duplicated chromosome.
B) gamete.
C) gametophyte.
D) haploid cell.
E) diploid cell.

F) A) and D)
G) C) and D)

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The process that merges the gametes from two parents is


A) conjugation.
B) mitosis.
C) meiosis.
D) parthenogenesis.
E) fertilization.

F) All of the above
G) A) and B)

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Meiotic cell division replicates a cell's DNA ____________ and then divides ______________


A) twice; twice.
B) once; once.
C) None of the answer choices are correct.
D) twice; once.
E) once; twice.

F) A) and E)
G) All of the above

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Meiosis is a process that produces


A) All of the answer choices are correct.
B) sperm cells.
C) haploid cells.
D) egg cells.
E) gametes.

F) B) and C)
G) C) and D)

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A zygote


A) has a diploid set of homologous chromosomes.
B) has mixed chromosomes from two gametes.
C) All answer choices are correct, except for being a cell produced by meiosis divisions.
D) is a cell produced by meiosis divisions.
E) is formed by fertilization.

F) A) and B)
G) B) and E)

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Among variations in people,those who have a single X chromosome are female,while those with XXY sex chromosomes are males.In order to be a female,a human


A) must have paired XX chromosomes.
B) cannot have a Y chromosome.
C) must have one X chromosome.
D) must have two X chromosomes.
E) must have one Y chromosome.

F) A) and E)
G) All of the above

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