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Biology > Exam 5 > Flashcards

Exam 5 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Nucleosomes are made of

A

DNA and histone proteins

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2
Q

Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following functions except

A

Production of sperm and eggs

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3
Q

The chromosomes of eukaryotic cells are found in the

A

Nucleus

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4
Q

Chromatin consist of

A

DNA and proteins

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5
Q

A duplicate a chromosome consists of two

A

Centrosomes

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6
Q

Sister chromatids are joined at the

A

Centromere

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7
Q

Which of the following occurs during interphase?

A

Chromosome duplication occurs

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8
Q

The mitotic cell cycle results in the production of

A

To cells, each with the same amount of genetic material in the same genetic information

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9
Q

Which of the following occurs during prophase?

A

The mitotic spindle begins to form

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10
Q

Which of the following is a stage of mitosis?

A

Telophase

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11
Q

The correct sequence of stage of mitosis is

A

Prophase, metaphase, anaphase, telophase

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12
Q

During metaphase

A

Chromosomes line up in the middle of the cell

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13
Q

Which of these events occur during anaphase?

A

Sister chromatids become separate chromosomes

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14
Q

During telophase

A

The events of prophase are reversed

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15
Q

A cell that completed the cell cycle without undergoing cytokinesis would

A

Have two nuclei

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16
Q

Cytokinesis typically begins during the _____ stage of mitosis

A

Telophase

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17
Q

What is the difference between a benign and a malignant tumor?

A

Benign tumor is do not metastasize; malignant tumors do

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18
Q

Which of the following will help prevent cancer and increase survival?

A

Seeker early detection of tumors

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19
Q

Homologous chromosomes

A

Carry genes control in the same inherited characteristics

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20
Q

What chromosomes belong to a normal human male?

A

44 autosomes, One X chromosome, one Y chromosome

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21
Q

What chromosomes belong to a normal human female?

A

44 autosomes and 2 X chromosomes

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22
Q

Chromosomes that do not determine the sex of an individual or called

A

Autosomes

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23
Q

Sexual reproduction in humans

A

Allow a haploid sperm cell to fertilize a haploid egg cell

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24
Q

Plant cell cytokinesis differs from animal so cytokinesis because

A

Plant cells form a cell plate and animal cells do not

25
Q

How much genetic material is present in a cell during prophase 1 compared to a cell that has completed meiosis 2

A

Four times as much

26
Q

During metaphase one,

A

Homologous Chromosomes line up in the middle of the cell

27
Q

Upon completion of televize one and cytokinesis there are

A

Two haploid cells

28
Q

Which of the following is a characteristic seen in prophase one that does not occur in prophase two?

A

Crossing over occurs

29
Q

Anaphase two is essentially the same as mitotic Anaphase except that in anaphase two____and in mitotic anaphase____

A

The cells are haploid and sister chromatids separate… The cells have the same number of chromosomes as the original cell and sister chromatids separate

30
Q

The diagram of human life cycle shows that

A

Meiosis produces haploid sperm and egg cells

31
Q

Genetic variation is accomplished by all but one of the following

A

The events of meiosis 2

32
Q

Which of the following is the best description of the events of anaphase one

A

Homologous Chromosomes randomly separate and migrate to the opposite poles

33
Q

In meiosis, how does prophase one differ from prophase two

A

During prophase one there is one diploid cell; during prophase there are two haploid cells

34
Q

Crossing over during prophase one results in

A

Genetic recombination

35
Q

A Karyotype would be unable to determine

A

Eye color

36
Q

How many chromosomes can a gimme possess as a result of non-disjunction

A

n+1 or n-1

37
Q

How many chromosomes does an individual with Turner syndrome have

A

2n-1

38
Q

What is the chromosome number found in humans sells after meiosis one is completed?

A

22 autosomes and a sex chromosome

39
Q

Which of these could lead to the mistake evident in the Karyotype?

A

A nondisjunction in meiosis two in gamete formation

40
Q

The figure above shows that

A

Meiosis results in the formation of four haploid daughter cells

41
Q

The 2n Number for the cell shown here is

A

Two sets

42
Q

Lymphoid tissue’s cancer is a type of

A

Lymphoma

43
Q

In crossing over, exchange of DNA segments occurs between

A

Non-sister chromatids of the homologous chromosome

44
Q

The Karyotype above shows

A

Trisomy 21, a cause of Down syndrome

45
Q

Which of the following may result when errors/mutation occurs in meiosis

A

A and B

46
Q

Blood cancer is a type of

A

Leukemia

47
Q

One possible result of chromosomal breakage is for a fragment to join a nonhomologous chromosome, this is called a

A

Translocation

48
Q

When is amniocentesis usually done?

A

Between weeks 14 and 20 of pregnancy

49
Q

Bone cancer is a type of

A

Sarcoma

50
Q

Poison referred to treatments that attempt to stop cancer cells from dividing by interfering

A

With the mitotic spindle

51
Q

Which one of the following mechanisms contributes to genetic variation?

A

A B and C

52
Q

When is CVS Test usually done

A

During the first trimester

53
Q

Individuals with down syndrome

A

I have an extra chromosome 21

54
Q

Individuals with meta-female syndrome

A

Have an extra X-chromosome

55
Q

In animals, somatic cells are produced by mitosis and____are produced by meiosis

A

Gametes

56
Q

Which of the following terms mostly associated with the word synapsis, tetrads, and chiasmata

A

Crossing over

57
Q

When can meiosis gone astray?

A

B and D

58
Q

Which of the following happens at the conclusion of meiosis one

A

Homologous Chromosomes are separated

Biology (11 decks)

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