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Chaper 7 test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. In a certain plant, the gene for a tall plant (T) is dominant over the gene for a short plant (t). The Punnett
square below shows the results of a cross between a tall plant and a short plant. Based on the Punnett square
below, what percentage of the offspring would be tall plants?
a. 25%
b. 75%
c. 50%
d. 100%
____
2. A male chimpanzee has 48 chromosomes in each of his regular body cells (non-gamete cells). How many
chromosomes would you find in each of his gamete cells (sperm cells)?
a. 48
c. 96
b. 24
d. 12
____
3. Color blindness results from a recessive sex-linked gene. Why are males more likely to be color-blind than
females?
a. because color blindness is influenced by hormones present in the males
b. because color blindness is carried only on the X-chromosome and the male only has one
X-chromosome
c. because color blindness is carried only on the Y-chromosome and the female does not
have a Y-chromosome
d. because color blindness is carried on both the X and the Y chromosomes and only males
have both chromosomes
Refer to the following diagram to answer the question(s) below.
____
4. What process does the diagram represent and what is the result of this process?
a. The process is bacteria cell division. This process results in daughter cells with half of the
genetic material.
b. The process is mitosis. This process results in daughter cells with an exact copy of the
genetic material.
c. The process is meiosis. This process results in more cells with an exact copy of the genetic
material.
d. The process is meiosis. This process results in daughter cells with half of the genetic
material.
____
5. What type of cell is represented at d) in the diagram?
a. gametes
c. zygotes
b. spores
d. body cells
____
6. Which of the following statements about traits is true?
a. Traits of the parents combine into a unique trait in the offspring.
b. Traits are only inherited from one of the parents.
c. Some traits are hidden in one generation and are present in the next generation.
d. Only observable traits are inherited.
____
7. Which of the following describes an individual’s genotype for an inherited trait?
a. family pedigree for the trait
b. sex of the individual in relation to the trait
c. set of alleles carried for the trait
d. physical appearance caused by the trait
____
8. Which of the following provides an explanation for genetic variation in a population?
a. Meiosis results in cells with half the genetic information of the parents.
b. Mitosis produces new cells that are genetically identical to the parents.
c. Sexual reproduction combines genetic information from two different individuals and
results in cells that contain two copies of each gene.
d. Inheritance results in traits being transmitted from one generation to another.
____
9. The occurrence of meiosis preceding sexual reproduction normally assures which process or which result?
a. New individuals will have the same number of chromosomes as their parents.
b. Cross-fertilization or cross-pollination will occur.
c. New individuals will be haploid.
d. Gametes will be diploid.
____ 10. Which event occurs during interphase?
a. The cell carries out metabolic processes.
b. Centrioles appear.
c. Spindle fibers begin to form.
d. Centromeres divide.
____ 11. During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?
a. prophase
b. telophase
c. metaphase
d. anaphase
____ 12. Unlike mitosis, meiosis results in the formation of
a. diploid cells.
b. haploid cells.
c. 2n daughter cells.
d. body cells.
____ 13. When during the cell cycle is a cell’s DNA replicated?
a. G1 phase
b. G2 phase
c. S phase
d. M phase
____ 14. The cell cycle is the
a. series of events that cells go through from “birth” to reproduction.
b. period of time between the birth and the death of a cell.
c. time from prophase until cytokinesis.
d. time it takes for one cell to undergo mitosis.
____ 15. Unlike mitosis, meiosis usually results in the formation of
a. two genetically identical cells.
b. four genetically different cells.
c. four genetically identical cells.
d. two genetically different cells.
____ 16. Gametes are produced by the process of
a. mitosis.
b. meiosis.
c. crossing-over.
d. replication.
Figure 9-2
____ 17. What is shown in Figure 9-2?
a. independent assortment
b. anaphase I of meiosis
c. crossing over
d. replication
____ 18. In the P generation, a true-breeding tall plant (dominant) is crossed with a true-breeding short plant
(recessive). The probability that an F2 plant will be tall is
a. 50%
b. 100%
c. 75%
d. 25%
____ 19. Asexual reproduction and sexual reproduction are different in that
a. individuals reproducing asexually transmit 100% of their genes to their progeny, whereas
individuals reproducing sexually only transmit 50%.
b. asexual reproduction produces offspring that are genetically identical to the parents,
whereas sexual reproduction gives rise to genetically distinct offspring.
c. asexual reproduction involves a single parent, whereas sexual reproduction involves two.
d. asexual reproduction only requires mitosis, whereas sexual reproduction always involves
meiosis.
e. all of the above
____ 20. How do the two members of a pair of homologous chromosomes differ from each other?
a. their length
b. the identity and relative position of the genes present on each of the chromosomes
c. their staining patterns
d. the position of the centromere within each of the chromosomes
e. the precise sequence of the DNA within each of the chromosomes
____ 21. The human X and Y chromosomes are
a. both present in every somatic cell of males and females alike.
b. of approximately equal size.
c. almost entirely homologous, despite their different names.
d. called "sex chromosomes" because they determine an individual's sex.
e. all of the above
____ 22. If the liver cells of an animal have 24 chromosomes, how many chromosomes do its sperm cells have?
a. 6
b. 12
c. 24
d. 48
e. 64
____ 23. Which of the following is true of a species that has a chromosome number of 2n = 16?
a. The species is diploid with 32 chromosomes.
b. The species has 16 sets of chromosomes.
c. There are 8 homologous pairs.
d. During the S phase of the cell cycle there will be 32 separate chromosomes.
e. A gamete from this species has 4 chromosomes.
____ 24. After telophase I of meiosis, the chromosomal makeup of each daughter cell is
a. diploid, and the chromosomes are composed of a single chromatid.
b. diploid, and the chromosomes are composed of two chromatids.
c. haploid, and the chromosomes are composed of a single chromatid.
d. haploid, and the chromosomes are composed of two chromatids.
e. tetraploid, and the chromosomes are composed of two chromatids.
____ 25. Which of the following is true of the process of meiosis?
a. Two diploid cells result.
b. Four diploid cells result.
c. Four haploid cells result.
d. Four autosomes result.
e. Four chiasmata result.
The pedigree chart below is for a family, some of whose members exhibit the recessive trait, wooly hair.
Affected individuals are indicated by an open square or circle. Use the chart to answer the following
questions.
____ 26. What is the genotype of individual B-5?
a. WW
b. Ww
c. ww
d. WW or ww
e. ww or Ww
____ 27. What is the likelihood that the progeny of D-3 and D-4 will have wooly hair?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
____ 28. What is the probability that individual C-1 is Ww?
a. 3/4
b. 1/4
c. 2/4
d. 2/3
e. 1
Use the diagram and description below to answer the following question.
In a particular plant, leaf color is controlled by gene D. Plants with the dominant allele D have dark green
leaves, and plants with the homozygous recessive dd genotype have light green leaves. A true-breeding
dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-pollinate. The
predicted outcome of this cross is diagrammed in the Punnett square shown below, where 1, 2, 3, and 4
represent the genotypes corresponding to each box within the square.
____ 29. Which of the boxes marked 1-4 correspond to plants with dark leaves?
a. 1 only
b. 1 and 2
c. 2 and 3
d. 4 only
e. 1, 2, and 3
____ 30. Which of the boxes correspond to plants with a heterozygous genotype?
a. 1
b. 1 and 2
c. 1, 2, and 3
d. 2 and 3
e. 2, 3, and 4
____ 31. Which of the plants will be true-breeding?
a. 1 and 4
b. 2 and 3
c. 1-4
d. 1 only
e. none
____ 32. P = purple, pp = white. The offspring of a cross between two heterozygous purple-flowering plants (Pp
results in
a. all purple-flowered plants.
b. purple-flowered plants and white-flowered plants.
c. two types of white-flowered plants: PP and Pp.
d. all white-flowered plants.
e. all pink-flowered plants.
Pp)
____ 33. Three babies were mixed up in a hospital. After consideration of the data below, which of the following
represent the correct baby and parent combinations?
Couple #
Blood Groups
I
A and A
II
A and B
III
B and O
Baby #
Blood Groups
1
B
2
O
3
AB
a.
b.
c.
d.
e.
I-3, II-1, III-2
I-1, II-3, III-2
I-2, II-3, III-1
I-2, II-1, III-3
I-3, II-2, III-1
____ 34. The pedigree in the figure below shows the transmission of a trait in a particular family. Based on this pattern
of transmission, the trait is most likely
a.
b.
c.
d.
e.
mitochondrial.
autosomal recessive.
sex-linked dominant.
sex-linked recessive.
autosomal dominant.
35.
P = purple, pp = white. The offspring of a cross between two heterozygous purple-flowering plants (Pp x Pp)
results in
a. all purple-flowered plants.
b. purple-flowered plants and white-flowered plants.
c. two types of white-flowered plants: PP and Pp.
d. all white-flowered plants.
e. all pink-flowered plants.
36. In guinea pigs, black fur is dominant. A black guinea pig is crossed with a white guinea pig. If the litter (many
babies) contains a white offspring, then the genotype of the black-haired parent must be:
a. homozygous dominant
b. homozygous recessive
c. heterozygous
d. phenotypic
Essay
37. The stages of meiosis are classified into two divisions: meiosis I and meiosis II. Compare and contrast these
two divisions.
USING SCIENCE SKILLS
Figure 9-4
Figure 9-6
38. Inferring What is the chromosome (diploid) number of the cell shown in Figure 9-4?
39. Observing List the stages in Figure 9-6 in which the cells are 2n and those in which the cells are n.
40. Create a dyhibrid cross between the following two parents.
RrYy & RrYy
Seed Shape
Seed Color
R – round
Y – yellow
r – wrinkled
y – green
41. From your dihybrid cross determine how many Wrinkled, Yellow peas are likely to occur in the offspring.
42. From your dihybrid cross determine how many Round, Green peas are likely to occur in the offspring.
Chaper 7 test
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
C
B
B
D
A
C
C
C
A
A
9.2.2 | 9.2kt
C
9.3.1 | 9.3kt
B
9.5.3 | 9.6.3
C
9.2.2
A
9.2kt
B
9.5.3 | 9.6.3
B
9.5kt
C
9.6kt
C
E
E
D
B
C
D
C
C
C
E
E
D
A
B
C
A
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
NOT:
PTS:
NOT:
PTS:
NOT:
PTS:
1
1
1
1
1
1
1
1
1
1
core
1
core
1
core
1
DIF:
Below average/Average
DIF:
Average/Above average
DIF:
Below average/Average
DIF:
Below average/Average
PTS: 1
DIF:
Average/Above average
PTS: 1
DIF:
Average/Above average
PTS: 1
DIF:
Below average/Average
PTS: 1
DIF:
Below average/Average
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
TOP:
Concept 13.1
Concept 13.2
Concept 13.2
Concept 13.2
Concept 13.2
Concept 13.3
Concept 13.3
Concept 14.4
Concept 14.4
Concept 14.4
Concept 14.1
Concept 14.1
Concept 14.1
Concept 14.1
Concept 14.3
Concept 15.5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
35. B
36. C
ESSAY
37. ANS:
Both meiosis I and meiosis II contain a prophase, a metaphase, and an anaphase. However, chromosomes
replicate prior to meiosis I but not prior to meiosis II. Also, during meiosis I, tetrads form and align along the
center of the cell. Then, the homologous chromosomes are separated and two haploid daughter cells form.
During meiosis II, sister chromatids align along the center of the cell and are then separated. Four haploid
daughter cells form.
PTS: 1
DIF: Average/Above average
OBJ: 9.5.3
OTHER
38. ANS:
Four
PTS: 1
DIF: Below average/Average
OBJ: 9.2.1
NOT: core
39. ANS:
The cells in stages A, B, and C are 2n. The cells in stages D, E, F, and G are n.
PTS: 1
40. ANS:
.
DIF: Average/Above average
OBJ: 9.5.3
RrYy
RY
Ry
rY
ry
RY
RRYY
RRYy
RrYY
RrYy
Ry
RRYy
RRyy
RrYy
Rryy
RrYy
rY
RrYY
RrYy
rrYY
rrYy
ry
RrYy
Rryy
rrYy
rryy
Figure 10-2
PTS: 1
41. ANS:
3
42. ANS: 3
Seed Shape
R – round
r – wrinkled
Seed Color
Y – yellow
y – green