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AP Bio - Cell Division and Mendelian Genetics

Total questions: 61

Worksheet time: 1hrs 1mins

Name
Class
Date
1.
If an organism’s diploid number is 12, its haploid number is
a)
6.
b)
12.
c)
24.
d)
3.
2.
Gametes are produced by the process of
a)
meiosis.
b)
mitosis.
c)
replication.
d)
crossing-over.
3.
Unlike mitosis, meiosis results in the formation of
a)
2N daughter cells.
b)
haploid cells.
c)
body cells.
d)
diploid cells.
4.
Assume that prophase begins with eight chromatids in the nucleus of a cell. When telophase ends, how many chromosomes w ill be
present in each new nucleus?
a)
8
b)
46
c)
16
d)
4
5.
During normal mitotic cell division, a parent cell having four chromosomes will produce two daughter cells, each conntaining
a)
4 chromosomes
b)
2 chromosomes
c)
16 chromosomes
d)
8 chromosomes
6.
During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?
a)
telophase
b)
prophase
c)
anaphase
d)
metaphase
7.
Which of the following is a correct statement about the events of the cell cycle?
a)
DNA replicates during cytokinesis
b)
Little happens during the G1 and G2 phases
c)
Interphase consists of the G1, S, and G2 phases
d)
The M phase is usually the longest phase
8.
The centromere is a region in which
a)
metaphase chromosomes become aligned at the metaphase plate.
b)
chromosomes are grouped during telophase.
c)
chromatids remain attached to one another until anaphase.
d)
the nucleus is located prior to mitosis.
9.
Which of the following is a protein maintained at constant levels throughout the cell cycle that
requires cyclin to become catalytically active?
a)
Cdk
b)
cyclin
c)
protein kinase
d)
MPF
10.
DNA is replicated at this time of the cell cycle:
a)
S
b)
G1
c)
M
d)
G2
11.
Proteins that are involved in the regulation of the cell cycle, and that show fluctuations in
concentration during the cell cycle, are called
a)
kinetochores.
b)
cyclins.
c)
centrioles.
d)
proton pumps.
12.

You have in your possession a microscope slide with meiotic cells on it and a light microscope.

What would you look for if you wanted to identify metaphase I of meiosis?

a)

Tetrads lined up at the center of the cell

b)

A synaptonemal complex

c)

Separated sister chromatids at each pole of the cell

d)

A visible nuclear envelope

13.
Which of the following shows the correct sequence of the cell cycle?
a)
Mitosis-> G1->S->G2->cytokinesis
b)
S->G1-> G2-> mitosis-> cytokinesis
c)
cytokinesis->mitosis->G1->S->G2
d)
 G1->S->G2->mitosis->cytokinesis
14.
sequence
a)
C,D, B, A, F, E
b)
D,A,F,C,E,B
c)
B,E,C,F,A,D
d)
C,B,D,A E,F
15.
the phase of mitosis in which the sister chromatids separate from each other
a)
prophase
b)
metaphase
c)
anaphase
d)
telophase
16.
Fruit fly body cells have 8 chromosomes. After mitosis, you would expect a resulting fruit fly daughter cell to have ...
a)
16 chromosomes.
b)
46 chromosomes.
c)
8 chromosomes.
d)
4 chromosomes.
17.
Which step of the cell cycle do cells spend a majority of their time?
a)
Prophase
b)
Interphase
c)
Mitosis
d)
Cytokinesis
18.
In which phase of mitosis does the nucleus disappear, centrioles move to the poles, and chromosomes condense into sister chromatids?
a)
Prophase
b)
Metaphase
c)
Anaphase
d)
Telophase
19.

Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?

a)

16

b)

5

c)

32

d)

64

20.

What is produced if the nucleus of the cell divides by mitosis but the cytoplasm does not undergo cytokinesis?

a)

one cell with two nuclei, each identical to the nucleus of the parent cell

b)

two cells, each with half of the genetic material of the parent cell

c)

two cells, one cell containing two nuclei and a second cell without a nucleus

d)

one cell with one nucleus containing half of the genetic material of the parent cell.

21.

If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?

a)

30

b)

20

c)

40

d)

10

22.

If a cell has completed the first meiotic division and is just beginning meiosis II, which of the following is an appropriate description of its contents?

a)

it has half the chromosomes but twice the DNA of the originating cell

b)

it has half the amount of DNA as the cell that began meiosis.

c)

It is identical in content to another cell from the same meiosis

d)

it has one-fourth the DNA and one-half the chromosomes as the originating cell.

23.
A recessive trait will be observed in individuals that are ________ for that trait.
a)
heterozygous
b)
homozygous or heterozygous
c)
homozygous
d)
diploid
24.
The chromosomes that pair up during meiosis, are called __________ chromosomes.  
a)
homozygous 
b)
asexual
c)
homologous
d)
genes
25.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
26.
In humans, hemophilia is an X-linked recessive trait. If a man and a woman have a son who is affected with hemophilia, which of the following is definitely true?
a)
The mother carries an allele for hemophilia
b)
The father carries an allele for hemophilia
c)
The father is afflicted with hemophilia
d)
both parents carry an allele for hemophilia
27.
The red and blue pair of chromosomes in the bottom row are
a)
genetically identical
b)
carrying the same  genes, but different alleles
c)
carrying completely different genes
d)
carrying the same genes and the same alleles
28.
What is the genotype of the father?
a)
AA
b)
aa
c)
Aa
d)
AA or aa
29.
Structure (b) is a ____.
a)
chromosome
b)
chromatid
c)
centromere
30.
What is it called when chromosomes fail to separate properly.
a)
Stickiness
b)
Independent Assortment
c)
Nondisjunction
d)
recombination
31.
Meiosis results in ______.
a)
4 genetically distinct haploid gametes
b)
2 genetically distinct cells
c)
2 genetically identical cells
d)
4 genetically identical cells
32.
Which genetic abnormality does this baby have?
a)
Partial Deletion
b)
Partial Addition
c)
Trisomy
d)
Monosomy
33.

You do a dihybrid cross - YyRr x YyRr. What are your expected ratios (if genes are not on the same chromosome)?

a)

1:1:1:1

b)

9:3:3:1

c)

4:0

d)

3:1

34.
Cells of organism must replicate for ?
a)
growth
b)
repair of damaged cells
c)
replacement of dying cells.
d)
All of the above
35.
The division of the nucleus is known as:
a)
Synthesis
b)
Mitosis
c)
G1
d)
G2
36.
Humans have ________ pairs of chromosomes.
a)
21
b)
23
c)
46
d)
None of the above
37.
Uncontrollable cell growth is known as _____
a)
obesity
b)
cancer
c)
diabetes
d)
hepatitis
38.
When a plant cell goes through cell division,  _____________.
a)
the 2 new nuclei are separated by the cell membrane pinching off.
b)
4 new cells are formed
c)
a cell plate forms, dividing the 2 new nuclei
d)
None of the above
39.
When an animal cell goes through cytokinesis,__________
a)
a cell plate forms dividing the 2 new nuclei.
b)
the cell membrane pinches off the 2 new cells.
c)
4 new cells are formed.
d)
None of the above
40.
The stages of mitosis in order
a)

Metaphase, Pro-Metaphase, Anaphase, Prophase, Telophase

b)
Prophase, Anaphase, Metaphase, Telophase
c)

Prophase, Prometaphase, Metaphase, Anaphase, Telophase

d)
Anaphase, Prophase, Telophase, Metaphase
41.

Having two different genes for a trait (sometimes called hybrid) is referred to as being:

a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
42.

Having two of the same genes for the trait (sometimes called purebred or true-breeding) is referred to as:

a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
43.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
44.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the probability of having a white flowered plant if the parents were heterozygous red and homozygous red?
a)
0%
b)
25%
c)
50%
d)
100%
45.
Human somatic cells have a _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
46.
Each parent contributes one of the genes for a particular trait. The genes of the pair are called:
a)
variables
b)
gametes
c)
hybrids
d)
alleles
47.

If both parents bear different alleles for one trait a cross results which

a)

is monohybrid

b)

produces only monohybrid offspring

c)

is dihybrid

d)

produces only heterozygous offspring

48.

A monohybrid cross will produce a genotype ratio of

a)

9:3:3:1

b)

3:1

c)

1:2:1

d)

15:1

49.

A monohybrid cross will produce a phenotype ratio of (assume no codominance)

a)

9:3:3:1

b)

3:1

c)

1:2:1

d)

15:1

50.

A dihybrid cross will produce a phenotypic ratio of (assume no codominance)

a)

9:3:3:1

b)

3:1

c)

1:2:1

d)

15:1

51.

A test cross would be represented by

a)

GG x GG

b)

Gg x gg

c)

GGHH x GgHh

d)

Hh xHh

52.

The probabability that a dihybrid cross will produce an organism with a genotype of DdHh is

a)

1/8

b)

1/2

c)

3/16

d)

1/16

e)

1/4

53.

The uppermost diagram represents a cell with a diploid number of 4.

What is the chromosomal condition of this cell during prophase of mitosis?

a)

a

b)

b

c)

c

d)

d

e)

e

54.

The uppermost diagram represents a cell with a diploid number of 4.

After completion of the first division of meiosis, a daughter cell could be

a)

a

b)

b

c)

c

d)

d

e)

e

55.

The uppermost diagram represents a cell with a diploid number of 4.

After completion of the second division of meiosis, a daughter cell could be

a)

a

b)

b

c)

c

d)

d

e)

e

56.

The uppermost diagram represents a cell with a diploid number of 4.

After completion of mitosis, a daughter cell would be

a)

a

b)

b

c)

c

d)

d

e)

e

57.

The chromosome number is reduced from diploid to haploid during

a)

mitosis

b)

first division of meiosis

c)

second division of mitosis

d)

fertilization

58.

Which of the following takes place during meiosis?

a)

two S phases

b)

reduction of chromosome number

c)

crossing over

d)

all of the above

e)

two of the above

59.

If 50% of the offspring from a test cross show the recessive phenotype, then the unknown parent was

a)

heterozygous

b)

homozygous

60.

Recombinants occur as a result of

a)

independent assortment

b)

crossing over

c)

codominance

d)

linkage

61.

When only one allele is expressed in the heterozygous condition, it is an example of

a)

the law of dominance

b)

the law of segregation

c)

independent assortment

d)

codominance

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