Question 1

Why does sexual reproduction produce more genetic variability in a population?

Accepted Answer

A)  Offspring are genetically identical to one parent.
B)  During sex,adults can exchange genetic material thus increasing their variability.
C)  Organisms arising from sexual reproduction can change their genetic material in response to environmental changes.
D)  Sexually-reproducing organisms mutate more rapidly than asexually reproducing organisms.
E)  Offspring are a genetic mix of both parents.F) C) and D)
G) B) and D) E

Question 2

A diploid cell with 6 chromosomes would produce which of the following after meiosis?

Accepted Answer

A)  Four genetically-distinct types of haploid gametes
B)  Two genetically-distinct types of diploid gametes
C)  Four genetically-distinct types of diploid gametes
D)  Eight genetically-distinct types of haploid gametes
E)  Eight genetically-identical haploid gametesF) B) and E)
G) B) and D)

Question 3

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",Tragopogon mirus is a hybrid of T.dubius and T porrifolius.Based on the figure,T.mirus has

Accepted Answer

A)  12 chromosomes from T.dubius and 12 chromosomes from T.porrifolius.
B)  6 chromosomes from T.dubius and 6 chromosomes from T.porrifolius.
C)  24 chromosomes from T.dubius and 24 chromosomes from T.porrifolius.
D)  24 chromosomes from T.dubius.
E)  24 chromosomes from T.porrifolius.F) A) and D)
G) B) and E)

Question 4

Why is it essential that meiosis produce haploid cells?

Accepted Answer

A)  so that the number of chromosomes will double each generation
B)  to produce haploid offspring
C)  to prevent the number of chromosomes from doubling each generation
D)  to produce diploid gametes
E)  to allow asexual reproductionF) B) and E)
G) None of the above

Question 5

When a human egg ovulates,it arrests in metaphase II until it is fertilized by a sperm.How many chromosomes are present in the egg at metaphase II?

Accepted Answer

A)  46
B)  2 with sister chromatids still attached
C)  4
D)  23 with sister chromatids still attached
E)  1F) C) and D)
G) A) and B)

Question 6

A diploid germ cell will produce cells that have reduced the chromosome number by half,generating four haploid nuclei in

Accepted Answer

A)  fertilization.
B)  mitosis.
C)  meiosis.
D)  replication.
E)  mutation.F) B) and D)
G) None of the above

Question 7

In humans,the sex of a child is determined by

Accepted Answer

A)  the sex chromosome in the egg.
B)  the number of autosomes in the sperm.
C)  the number of autosomes in the egg.
D)  the sex chromosome in the sperm.
E)  the number of X chromosomes in the egg.F) C) and E)
G) A) and E)

Question 8

A diploid cell with 4 chromosomes would produce which of the following after meiosis?

Accepted Answer

A)  Two genetically-distinct types of haploid gametes
B)  Two genetically-distinct types of diploid gametes
C)  Four genetically-distinct types of haploid gametes
D)  Four genetically-distinct types of diploid gametes
E)  Four genetically-identical diploid gametesF) A) and C)
G) A) and E) C

Question 9

Homologous chromosomes contain the same ____ but may contain different ____.

Accepted Answer

A)  alleles,genes
B)  sister chromatids,genes
C)  alleles,sister chromatids
D)  genes,sister chromatids
E)  genes,allelesF) C) and D)
G) B) and E)

Question 10

Sexual reproduction and meiosis generate genetic variety by

Accepted Answer

A)  random fertilization.
B)  All answers are correct.
C)  independent assortment.
D)  crossing over.E) None of the above
F) A) and D) B

Question 11

If a human zygote has either 45 or 47 chromosomes it was caused by random fertilization.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following will occur in meiosis but not in mitosis?

Accepted Answer

A)  metaphase
B)  cytokinesis
C)  crossing over
D)  DNA replication
E)  chromosome condensationF) C) and E)
G) A) and E)

Question 13

If you mate a donkey (2n = 62) with a horse (2n = 64) you get a mule.A mule is sterile and cannot produce gametes by meiosis because

Accepted Answer

A)  they contain too few chromosomes.
B)  they have an odd number of chromosomes.
C)  they have an even number of chromosomes.
D)  they contain too many chromosomes.
E)  they lack genes that are essential for lifE.F) A) and D)
G) None of the above

Question 14

Diploid means having

Accepted Answer

A)  one complete set of chromosomes.
B)  three complete sets of chromosomes.
C)  two complete sets of chromosomes.
D)  two chromosomes in each somatic cell.
E)  two chromosomes in each gametE.F) A) and C)
G) B) and C)

Question 15

In meiosis,DNA replicates during

Accepted Answer

A)  prophase I.
B)  prophase II.
C)  interphase prior to meiosis II.
D)  interphase prior to meiosis I.
E)  both prophase I and prophase II.F) C) and E)
G) B) and C)

Question 16

Meiosis is a process that produces

Accepted Answer

A)  sperm cells.
B)  egg cells.
C)  gametes.
D)  haploid cells.
E)  All answers are correct.F) A) and E)
G) C) and E)

Question 17

Chromosomes that look alike and carry the same sequence of genes for the same traits are

Accepted Answer

A)  the X and Y chromosome.
B)  all the autosomes.
C)  homologous chromosomes.
D)  found in females only.
E)  found in males only.F) D) and E)
G) A) and E)

Question 18

What two processes results in genetically-different products?

Accepted Answer

A)  mitosis and meiosis
B)  mitosis and asexual reproduction
C)  meiosis and asexual reproduction
D)  meiosis and sexual reproduction
E)  mitosis and sexual reproductionF) B) and D)
G) A) and E)

Question 19

Mitotic cell division creates identical copies by replicating a cell's DNA __________ and then dividing ____________.

Accepted Answer

A)  once,twice
B)  twice,once
C)  twice,twice
D)  once,once
E)  None of the answers are correct.F) All of the above
G) B) and C)

Question 20

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",pollen contains _____ that produce _____.

Accepted Answer

A)  gametophytes,spores
B)  sporophytes,sperm
C)  sporophytes,spores
D)  sperm,spores
E)  gametophytes,spermF) C) and E)
G) B) and E)

Exam 9: Sexual Reproduction and Meiosis

Why does sexual reproduction produce more genetic variability in a population?

Correct AnswerverifiedE

A diploid cell with 6 chromosomes would produce which of the following after meiosis?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",Tragopogon mirus is a hybrid of T.dubius and T porrifolius.Based on the figure,T.mirus has

Correct AnswerverifiedShow Answer

Why is it essential that meiosis produce haploid cells?

Correct AnswerverifiedShow Answer

When a human egg ovulates,it arrests in metaphase II until it is fertilized by a sperm.How many chromosomes are present in the egg at metaphase II?

Correct AnswerverifiedShow Answer

A diploid germ cell will produce cells that have reduced the chromosome number by half,generating four haploid nuclei in

Correct AnswerverifiedShow Answer

In humans,the sex of a child is determined by

Correct AnswerverifiedShow Answer

A diploid cell with 4 chromosomes would produce which of the following after meiosis?

Correct AnswerverifiedC

Homologous chromosomes contain the same ____ but may contain different ____.

Correct AnswerverifiedShow Answer

Sexual reproduction and meiosis generate genetic variety by

Correct AnswerverifiedB

If a human zygote has either 45 or 47 chromosomes it was caused by random fertilization.

Correct AnswerverifiedShow Answer

Which of the following will occur in meiosis but not in mitosis?

Correct AnswerverifiedShow Answer

If you mate a donkey (2n = 62) with a horse (2n = 64) you get a mule.A mule is sterile and cannot produce gametes by meiosis because

Correct AnswerverifiedShow Answer

Diploid means having

Correct AnswerverifiedShow Answer

In meiosis,DNA replicates during

Correct AnswerverifiedShow Answer

Meiosis is a process that produces

Correct AnswerverifiedShow Answer

Chromosomes that look alike and carry the same sequence of genes for the same traits are

Correct AnswerverifiedShow Answer

What two processes results in genetically-different products?

Correct AnswerverifiedShow Answer

Mitotic cell division creates identical copies by replicating a cell's DNA __________ and then dividing ____________.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",pollen contains _____ that produce _____.

Correct AnswerverifiedShow Answer

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E

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C

Homologous chromosomes contain the same but may contain different .

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B

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Mitotic cell division creates identical copies by replicating a cell's DNA and then dividing __.

Correct Answer
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In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",pollen contains _ that produce _.

Correct Answer
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