Question 1

Fraternal twins (dizygotic) result from the fertilization of

Accepted Answer

A)  two eggs and two sperm.
B)  two eggs and one sperm.
C)  one egg and two sperm.
D)  one egg and one sperm.
E)  two eggs and one sperm OR one egg and two sperm.F) A) and E)
G) A) and B)

Question 2

The chromosomal designation for a human female is

Accepted Answer

A)  XYY.
B)  XY.
C)  YY.
D)  XX.
E)  No answer is correct.F) A) and D)
G) B) and E)

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A)  must have two X chromosomes.
B)  cannot have a Y chromosome.
C)  must have only one X chromosome.
D)  must have only one Y chromosome.
E)  cannot have an X chromosomE.F) A) and E)
G) A) and C)

Question 5

If a chromosome in one of your bone cells becomes mutated,you will not pass this mutation onto your children because

Accepted Answer

A)  somatic cells cannot undergo mitosis.
B)  germ cells cannot undergo meiosis.
C)  germ cells cannot undergo mitosis.
D)  somatic cells cannot undergo meiosis.E) A) and B)
F) B) and C)

Question 6

Genetic variability will not occur among offspring if independent assortment does not occur during anaphase I of meiosis.

Accepted Answer

A) True 
 B)False

Question 7

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

Question 8

If a diploid cell goes through mitosis it will generate

Accepted Answer

A)  four haploid cells.
B)  two diploid cells.
C)  two haploid cells.
D)  four diploid cells.
E)  This is not possiblE.F) C) and D)
G) A) and B)

Question 9

Meiosis generates genetic variability by crossing over of homolgous chromosmoes in haploid somatic cells.

Accepted Answer

A) True 
 B)False

Question 10

Genetic information is passed from one generation to the next through

Accepted Answer

A)  DNA.
B)  asexual reproduction.
C)  sexual reproduction.
D)  gametes.
E)  All answers are correct.F) B) and C)
G) D) and E)

Question 11

Alternate forms of the same gene

Accepted Answer

A)  do not exist.
B)  are alleles.
C)  are homologs.
D)  are sister chromatids.
E)  do not occur in the same individual.F) A) and C)
G) A) and E)

Question 12

If you were told that you would get extra credit for finding a model showing chromsomes separating while sister chromatids were still attached,you would look for a model of

Accepted Answer

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

Question 13

After the completion of meiosis in humans,a diploid germ cell has produced cells with half the original chromosome number,generating __________ haploid nuclei.

Accepted Answer

A)  2
B)  3
C)  4
D)  23
E)  46F) None of the above
G) A) and B)

Question 14

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)  No answer is correct.F) A) and C)
G) A) and E)

Question 15

When chromosomes fail to separate at either the first or second meiotic division,this

Accepted Answer

A)  is known as crossing over.
B)  results in a sperm or egg cell with an abnormal number of chromosomes.
C)  is known as translocation.
D)  results in a failure to produce gametes.
E)  results in arrest during meiosis.F) B) and E)
G) None of the above

Question 16

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

Accepted Answer

A)  sexual reproduction requires less overall energy expenditure than asexual reproduction.
B)  sexual reproduction produces genetically different individuals.
C)  sexual reproduction requires only one individual.
D)  sexual reproduction produces genetically identical individuals.
E)  All answers are correct.F) A) and D)
G) A) and E)

Question 17

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 B)
G) B) and D)

Question 18

What process creates daughter cells with a mixture of paternal and maternal chromosomes?

Accepted Answer

A)  asexual reproduction
B)  semiconservative replication
C)  random fertilization
D)  independent assortment
E)  mutationF) A) and B)
G) A) and E)

Question 19

Genetic variability will not occur among offspring if crossing over does not occur during prophase I of meiosis.

Accepted Answer

A) True 
 B)False

Question 20

If a diploid cell goes through meiosis it will generate

Accepted Answer

A)  two haploid cells.
B)  four diploid cells.
C)  two diploid cells.
D)  four haploid cells.
E)  This is not possiblE.F) B) and E)
G) B) and C)

Exam 9: Sexual Reproduction and Meiosis

Genetic variability will not occur among offspring if independent assortment does not occur during anaphase I of meiosis.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Genetic variability will not occur among offspring if crossing over does not occur during prophase I of meiosis.

Correct AnswerverifiedShow Answer

If a chromosome in one of your bone cells becomes mutated,you will not pass this mutation onto your children because

Correct AnswerverifiedShow Answer

Genetic information is passed from one generation to the next through

Correct AnswerverifiedShow Answer

If a diploid cell goes through mitosis it will generate

Correct AnswerverifiedShow Answer

Meiosis generates genetic variability by crossing over of homolgous chromosmoes in haploid somatic cells.

Correct AnswerverifiedShow Answer

Alternate forms of the same gene

Correct AnswerverifiedShow Answer

If you were told that you would get extra credit for finding a model showing chromsomes separating while sister chromatids were still attached,you would look for a model of

Correct AnswerverifiedShow Answer

What process creates daughter cells with a mixture of paternal and maternal chromosomes?

Correct AnswerverifiedShow Answer

The chromosomal designation for a human female is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When chromosomes fail to separate at either the first or second meiotic division,this

Correct AnswerverifiedShow Answer

Fraternal twins (dizygotic) result from the fertilization of

Correct AnswerverifiedShow Answer

After the completion of meiosis in humans,a diploid germ cell has produced cells with half the original chromosome number,generating __________ haploid nuclei.

Correct AnswerverifiedShow Answer

Diploid means having

Correct AnswerverifiedShow Answer

If a diploid cell goes through meiosis it will generate

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified