Download Name Date 11 Quiz

Name _______________________ Date _________________Chapter 11 Quiz
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
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1. Gregor Mendel used pea plants to study
a. flowering.
c. the inheritance of traits.
b. gamete formation.
d. cross-pollination.
2. Gregor Mendel removed the male parts from the flowers of some plants in order to
a. prevent hybrids from forming.
b. prevent cross-pollination.
c. stimulate self-pollination.
d. make controlled crosses between plants.
3. The principle of dominance states that
a. all alleles are dominant.
b. all alleles are recessive.
c. some alleles are dominant and others are recessive.
d. alleles are neither dominant nor recessive.
4. A tall plant is crossed with a short plant. If the tall F1 pea plants are allowed to self-pollinate,
a. the offspring will be of medium height.
b. all of the offspring will be tall.
c. all of the offspring will be short.
d. some of the offspring will be tall, and some will be short.
5. In the P generation, a tall plant was crossed with a short plant. If alleles did not segregate during gamete
formation,
a. all of the F1 plants would be short.
b. some of the F1 plants would be tall and some would be short.
c. all of the F2 would be short.
d. all of the F2 plants would be tall.
6. Organisms that have two identical alleles for a particular trait are said to be
a. hybrid.
c. heterozygous.
b. homozygous.
d. dominant.
7. A Punnett square shows all of the following EXCEPT
a. all possible results of a genetic cross.
b. the genotypes of the offspring.
c. the alleles in the gametes of each parent.
d. the actual results of a genetic cross.
8. What principle states that during gamete formation genes for different traits separate without influencing each
other’s inheritance?
a. principle of dominance
c. principle of probabilities
b. principle of independent assortment
d. principle of segregation
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
Seed Shape
R = Round
r = Wrinkled
Seed Color
Y = Yellow
y = Green
Figure 11–2
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9. The Punnett square in Figure 11–2 shows that the gene for pea shape and the gene for pea color
a. assort independently.
c. have the same alleles.
b. are linked.
d. are always homozygous.
____ 10. Situations in which one allele for a gene is not completely dominant over another allele for that gene are
called
a. multiple alleles.
c. polygenic inheritance.
b. incomplete dominance.
d. multiple genes.
____ 11. Gregor Mendel’s principles of genetics apply to
a. plants only.
c. pea plants only.
b. animals only.
d. all organisms.
____ 12. Gametes are produced by the process of
a. mitosis.
c. crossing-over.
b. meiosis.
d. replication.
Completion
Complete each sentence or statement.
13. The plants that Gregor Mendel crossed to produce the F1 generation made up the ____________________
generation.
14. If the allele for shortness in pea plants were dominant, all the pea plants in Mendel’s F1 generation would
have been ____________________.
15. If the alleles for traits in pea plants did not segregate during gamete formation, offspring that were recessive
for a trait could be produced only by crossing two plants that were ____________________ for that trait.
16. The principle of independent assortment states that ____________________ for different traits can segregate
independently during the formation of gametes.
Short Answer
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
Seed Shape
R = Round
r = Wrinkled
Seed Color
Y = Yellow
y = Green
Figure 11–2
17. What is the phenotype ratio of the offspring in the Punnett square shown in Figure 11–2?
USING SCIENCE SKILLS
Heterozygous male guinea pigs with black, rough hair (BbRr) are crossed with heterozygous female guinea
pigs with black, rough hair (BbRr). The incomplete Punnett square in Figure 11-4 shows the expected results
from the cross.
BbRr
BR
Br
bR
br
BR
BBRR
BBRr
BbRR
BbRr
Br
BBRr
BBrr
BbRr
Bbrr
BbRr
bR
BbRR
BbRr
?
bbRr
br
BbRr
Bbrr
bbRr
bbrr
Hair Color
B = Black
b = White
Hair Texture
R = Roughr =
Smooth
Figure 11–4
18. Using Tables and Graphs Identify the genotype of the offspring that would be represented by the question
mark in Figure 11–4.
19. Using Tables and Graphs Identify the phenotype of the offspring represented by the question mark in Figure
11–4.
20. Analyzing Data In Figure 11–4, what are the different phenotypes of the offspring?