Author: Biology Junction Team

Introduction to Plants Study Guide

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Introduction to Plants Quiz

 

 

Modified True/False
Indicate whether the statement is true or false.  If false, change the identified word or phrase to make the statement true.
 1.
Plants are multicellular prokaryotes. _________________________
 2.
The plant life cycle includes a diploid gamete and a haploid spore. _________________________
 3.
Mosses are most often found in dry environments. _________________________
 4.
Mosses and liverworts lack a vascular system for transporting water and nutrients. _________________________
 5.
Water must be present for fertilization to take place in mosses. _________________________
 6.
In mosses and liverworts, eggs are formed through mitosis in the antheridia. _________________________
 7.
Gametophytes of conifers are physically much larger than their sporophytes. _________________________
 8.
One important difference between mosses and ferns is that mosses have a vascular system. _________________________
 9.
Shoots, stems, and roots characterize the bodies of vascular plant sporophytes. _________________________
 10.
Ferns are characterized by fronds and fiddleheads. _________________________
 11.
Haploid fern spores are produced by gametophytes. _________________________
 12.
In ferns, a large sporophyte with leaves called fronds alternates with a heart-shaped gametophyte. _________________________
 13.
Ferns need water to reproduce because their sperm must swim to eggs. _________________________
 14.
Both mosses and ferns require a thin film of water for gametes to meet. _________________________
 15.
In both mosses and ferns, eggs are formed through mitosis in the antheridia. _________________________
 16.
Gymnosperm seeds are enclosed in a fruit. _________________________
 17.
Gametophytes of seed plants are large and easily viewed with the unaided eye. _________________________
 18.
Sexual reproduction in seed plants involves the transfer of pollen from the male reproductive structures of a plant to the female reproductive structures. _________________________
 19.
Seed plants cannot reproduce without a film of water for transferring of gametes. _________________________
 20.
A seed is a structure that contains a plant embryo. _________________________
 21.
A plant embryo is a new sporophyte. _________________________
 22.
In flowering plants, the embryos of monocots have two cotyledons. _________________________
 23.
Pollen is produced in the tip of the stamen, a structure called the sepal. _________________________
 24.
The lower portion of the pistil produces pollen. _________________________
 25.
Gametophytes develop within flowers. _________________________
 26.
Pollen tubes grow through the style toward the ovule. _________________________
 27.
Many seeds have appendages that aid in dispersal. _________________________
 28.
Asexual reproduction produces new plants that are genetically different from the parent plant. _________________________
 29.
Vegetative reproduction does require a plant to have flowers. _________________________
 30.
In vegetative reproduction, new plants may be generated from stems or roots. _________________________
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 31.
The ancestors of today’s land plants were probably
a.
 brown algae.
c.
 green algae.
b.
 red algae.
d.
 lichens.
 32.
Among the challenges that faced early land plants were
a.
 eliminating excess water.
b.
 obtaining sunlight for photosynthesis.
c.
 absorbing minerals from the rocky surface.
d.
 avoiding being eaten by grazing mammals.
 33.
The waxy protective covering of a land plant is called a
a.
 cuticle.
c.
 rhizome.
b.
 capsule.
d.
 stoma.
 34.
Some land plants developed an internal system of interconnected tubes and vessels called
a.
 cuticles.
c.
 a circulatory system.
b.
 nonvascular canals.
d.
 vascular tissue.
 35.
sporophytes : spores ::
a.
 sporophytes : gametophytes
c.
 gametes : gametophytes
b.
 gametophytes : gametes
d.
 sporophytes : gametes
 36.
The diploid form in a plant’s life cycle is called the
a.
 sporophyte.
c.
 parental generation.
b.
 gametophyte.
d.
 alternate generation.
 37.
The haploid form in a plant’s life cycle is called the
a.
 sporophyte.
c.
 parental generation.
b.
 gametophyte.
d.
 alternate generation.
 38.
A haploid stage following a diploid stage in a plant’s life cycle is called
a.
 generational recycling.
c.
 alternating forms.
b.
 periodic gametogenesis.
d.
 alternation of generations.
 39.
In plants, haploid gametes are produced as a result of
a.
 fertilization.
c.
 encapsulation.
b.
 meiosis.
d.
 mitosis.
 40.
sporophytes : meiosis ::
a.
 sporophytes : spores
c.
 gametophytes : gametes
b.
 gametophytes : mitosis
d.
 sporophytes : gametes
 41.
Mosses, hornworts, and liverworts all possess
a.
 fibrous roots.
c.
 tap roots.
b.
 spore capsules.
d.
 green leaves.
 42.
In nonvascular plants, structures in which spores are produced are known as
a.
 meristems.
c.
 cones.
b.
 pollen grains.
d.
 sporangia.
 43.
Which of the following statements about moss spores is not true?
a.
 They are produced by the sporophyte.
b.
 They are dispersed and then germinate.
c.
 They are produced in a capsule-like top.
d.
 They are diploid.
 44.
The sporophyte generation in mosses produces spores by
a.
 meiosis.
c.
 sexual reproduction.
b.
 mitosis.
d.
 asexual reproduction.
 45.
The most noticeable form of a moss life cycle is the
a.
 sporophyte.
c.
 rhizoid.
b.
 gametophyte.
d.
 zygote.
 46.
In which of the following structures do seedless plants produce eggs?
a.
 antheridia
c.
 archegonia
b.
 capsules
d.
 cones
 47.
antheridia : sperm ::
a.
 rhizoids : gametes
c.
 archegonia : eggs
b.
 seeds : gametophytes
d.
 sperm : megaspores
 48.
Both mosses and ferns produce
a.
 seeds.
c.
 flowers.
b.
 fruit.
d.
 spores.
 49.
Fern sporophytes consist of rhizomes,
a.
 large leaves, and flowers.
c.
 pollen grains, and ovules.
b.
 cones, and stems.
d.
 roots, and fronds.
 50.
Unlike mosses, ferns possess
a.
 spore capsules.
c.
 antheridia.
b.
 archegonia.
d.
 vascular tissue.
 51.
Fiddleheads are produced by
a.
 whisk ferns.
c.
 ferns.
b.
 club mosses.
d.
 horsetails.
 52.
Both mosses and ferns produce gametes through
a.
 mitosis.
c.
 osmosis.
b.
 meiosis.
d.
 diffusion.
 53.
vascular plants : sporophytes ::
a.
 sporophytic plants : gametophytes
c.
 spores : gametes
b.
 gametes : sporophytes
d.
 nonvascular plants : gametophytes
The diagram below shows the plant life cycle.

nar001-1.jpg
 54.
Refer to the diagram above. At which point in the life cycle does fertilization take place?
a.
 1
c.
 3
b.
 2
d.
 4
 55.
Refer to the diagram above. The structures produced at 3 are called
a.
 sporangia.
c.
 spores.
b.
 archegonia.
d.
 antheridia.
 56.
Which of the following were the first land plants to evolve seeds?
a.
 angiosperms
c.
 mosses
b.
 gymnosperms
d.
 horsetails
 57.
liverworts, hornworts, and mosses : nonvascular plants ::
a.
 gymnosperms and angiosperms : bryophytes
b.
 ferns : mosses
c.
 gymnosperms and angiosperms : seed plants
d.
 bryophytes and liverworts : vascular plants
 58.
gymnosperms : naked seeds ::
a.
 pollen : mosses
c.
 liverwort : vascular tissue
b.
 liverwort : pollen
d.
 angiosperms : enclosed seeds
 59.
In seed plants, female gametophytes produce
a.
 sperm.
c.
 cells.
b.
 eggs.
d.
 spores.
 60.
A male gametophyte of a seed plant develops into a
a.
 pollen grain.
c.
 pollen tube.
b.
 spore capsule.
d.
 seed coat.
 61.
The partially developed plant found in seeds is known as a(n)
a.
 gametophyte.
c.
 embryo.
b.
 spore capsule.
d.
 sporophyte.
 62.
A typical seed contains all of the following except a(n)
a.
 seed coat.
c.
 embryo.
b.
 nutritious tissue.
d.
 spore case.
 63.
The tallest trees in the world are a species of
a.
 conifers.
c.
 liverworts.
b.
 dicots.
d.
 angiosperms.
 64.
The process of transferring pollen from a male cone to a female cone in gymnosperms is called
a.
 fertilization.
c.
 pollination.
b.
 seed formation.
d.
 asexual reproduction.
 65.
In conifers, the diploid condition is resumed following
a.
 pollination.
c.
 respiration.
b.
 fertilization.
d.
 sporulation.
 66.
The seeds of monocots have
a.
 one embryo and two cotyledons.
c.
 one embryo and one cotyledon.
b.
 two embryos and two cotyledons.
d.
 two embryos and one cotyledon.
 67.
Flowering plants are classified as monocots or dicots according to the number of their
a.
 leaves.
c.
 meristems.
b.
 flowers.
d.
 cotyledons.
 68.
Monocots and dicots are subdivisions of
a.
 angiosperms.
c.
 ferns.
b.
 gymnosperms.
d.
 mosses.
nar002-1.jpg
 69.
Refer to the diagram above. The structure labeled f
a.
 supports the anther.
c.
 supports the pistil.
b.
 produces pollen.
d.
 develops into a fruit.
 70.
Refer to the diagram above. The structure labeled c
a.
 produces pollen.
b.
 contains sperm cells.
c.
 is the area where pollen lands and sticks.
d.
 contains meristematic tissue.
 71.
Removing a flower’s stigma would initially affect
a.
 fertilization.
c.
 pollination.
b.
 seed production.
d.
 seed dispersal.
 72.
Pollen is produced in a structure called the
a.
 anther.
c.
 ovary.
b.
 stigma.
d.
 pistil.
 73.
In angiosperms, immediately following pollination,
a.
 the seed develops.
c.
 fertilization occurs.
b.
 an egg cell is formed.
d.
 the pollen tube begins to form.
 74.
During fertilization in flowering plants, one sperm fuses with an egg to form an embryo, and another fuses with two nuclei to form nutritive tissue. This event is called
a.
 self-pollination.
c.
 maximization.
b.
 adaptation.
d.
 double fertilization.
 75.
fruit : mature ovary
a.
 gametophyte : sporophyte
c.
 cotyledon : food reserve
b.
 gymnosperm : angiosperm
d.
 vascular plant : nonvascular plant
 76.
If a plant’s flowers are very colorful and produce nectar, the plant is probably pollinated by
a.
 water.
c.
 insects.
b.
 wind.
d.
 self-pollination.
 77.
One way that flowers produced by angiosperms help ensure the transfer of gametes is by
a.
 traveling in the air currents.
b.
 bursting open and projecting gametes onto the landscape.
c.
 attracting animals that carry pollen from one flower to another.
d.
 producing tasty fruits that animals depend on for food.
 78.
What function do all fruits produced by angiosperms perform?
a.
 produce nutrients for the plant
b.
 nourish the embryos
c.
 disperse the seeds
d.
 ensure pollination
 79.
Which structure allows plants to reproduce asexually?
a.
 tuber
c.
 archegonium
b.
 flower
d.
 antheridium
 80.
The production of offspring genetically identical to the parent plant is the result of
a.
 sexual reproduction.
c.
 alternation of generations.
b.
 asexual reproduction.
d.
 double fertilization.
 

Completion
Complete each statement.
 81.
The surface of a vascular plant is covered by a waxy, waterproof layer called a(n) ____________________.
 82.
One of the first environmental challenges that early land plants had to overcome was developing a way to conserve ____________________.
 83.
The sporophyte generation produces spores by the process of ____________________.
 84.
The haploid form of a plant is known as the ____________________ generation.
 85.
Nonvascular plants transport materials within their bodies through the process of ____________________.
 86.
A green, hornlike sporophyte growing upward from the gametophyte is typical of plants known as ____________________.
 87.
In mosses and liverworts, the ____________________ generation is the dominant generation.
 88.
The very tiny liverwort ____________________ grow from the archegonia under the caps of female stalks.
 89.
The gametophytes of ____________________ plants are larger and more noticeable than the sporophytes.
 90.
The seedless plants produce sperm within the ____________________.
 91.
True roots, stems, and leaves are associated with ____________________ plants.
 92.
A fern is an example of a(n) ____________________ vascular plant.
 93.
Both mosses and ferns produce eggs within structures called ____________________.
 94.
Like the nonvascular plants, the seedless vascular plants can reproduce sexually only when a film of ____________________ covers the gametophyte.
 95.
Unlike mosses, ferns have sporophytes that are much ____________________ than their gametophytes.
 96.
Seed plants whose seeds do not develop within a sealed container (fruit) are called ____________________.
 97.
Fruit is a characteristic associated only with the flowering plants, or ____________________.
 98.
A male gametophyte of a seed plant develops into a(n) ____________________.
 99.
The ____________________ is the protective cover that surrounds a seed.
 100.
The seed coat prevents the embryo from drying out, from mechanical injury, and from ____________________.
 101.
A(n) ____________________ is a specialized structure that develops from an ovule and serves to protect a plant embryo from harsh conditions.
 102.
The four major groups of gymnosperms are gnetophytes, cycads, ginkgoes, and ____________________.
 103.
A mature pine tree produces both male and female ____________________.
 104.
Gymnosperms are pollinated by ____________________, which makes sexual reproduction possible even during dry conditions.
 105.
The life cycle of a conifer is characterized by a large ____________________ generation.
 106.
In conifers, seeds form on the ____________________ of cones.
 107.
A plant that has flower parts that occur in fours or fives or multiples of four or five is a member of a subgroup called a(n) ____________________.
nar002-1.jpg
 108.
Refer to the diagram above. The structure labeled f is called the ____________________.
 109.
Refer to the diagram above. The structure labeled b is called the ____________________.
 110.
Refer to the diagram above. A flower like this one has all four basic flower parts and thus is an example of a(n) ____________________ flower.
 111.
The transfer of pollen grains from an anther to a stigma is known as ____________________.
 112.
In angiosperms, seeds develop from the ____________________ inside a(n) ____________________ after an egg has been fertilized.
 113.
The event in which one sperm fertilizes an egg and a second sperm fuses with two nuclei is called _________________________.
 114.
A flower is a(n) ____________________ structure that produces pollen and seeds.
 115.
Flowers are a source of ____________________ for pollinators.
 116.
The seeds of angiosperms are enclosed in ____________________.
 117.
Because flowering plants are rooted in the ground and cannot move from place to place, they must disperse their ____________________ so that their offspring can grow in new environments.
 118.
Many fruits are spread by ____________________ that are attracted to sweet, fleshy fruits, which they use for food.
 119.
Many of the structures by which plants reproduce vegetatively are modified ____________________.
 120.
Bulbs, stolons, and tubers are examples of modified stems that allow plants to reproduce ____________________.

 
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Genetics Practice Test Bi

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Chapter 9 Test, Form A
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
1.
The “father” of genetics was
a.
T. A. Knight.
c.
Gregor Mendel.
b.
Hans Krebs.
d.
None of the above
2.
Mendel obtained his P generation by allowing the plants to
a.
self-pollinate.
c.
assort independently.
b.
cross-pollinate.
d.
segregate.
3.
What is the probability that the offspring of a homozygous dominant individual and a homozygous recessive individual will exhibit the dominant phenotype?
a.
0.25
c.
0.66
b.
0.5
d.
1.0
4.
True-breeding pea plants always
a.
are pollinated by hand.
b.
produce offspring with either form of a trait.
c.
produce offspring with only one form of a trait.
d.
are heterozygous.
5.
The first filial (F1) generation is the result of
a.
cross-pollination among parents and the next generation.
b.
crosses between individuals of the parental generation.
c.
crosses between the offspring of a parental cross.
d.
self-fertilization between parental stock.
6.
Which of the following is the designation for Mendel’s original pure strains of plants?
a.
P
c.
F1
b.
P1
d.
F2
7.
A genetic trait that appears in every generation of offspring is called
a.
dominant.
c.
recessive.
b.
phenotypic.
d.
superior.
8.
To describe how traits can disappear and reappear in a certain pattern from generation to generation, Mendel proposed
a.
the law of independent assortment.
b.
the law of segregation.
c.
the law of genotypes.
d.
that the F2 generation will only produce purple flowers.
9.
When Mendel crossed pea plants with two contrasting traits, such as flower color and plant height,
a.
these experiments led to his law of segregation.
b.
he found that the inheritance of one trait did not influence the inheritance of the other trait.
c.
he found that the inheritance of one trait influenced the inheritance of the other trait.
d.
these experiments were considered failures because the importance of his work was not recognized.
10.
If an individual has two recessive alleles for the same trait, the individual is said to be
a.
homozygous for the trait.
c.
heterozygous for the trait.
b.
haploid for the trait.
d.
mutated.
11.
An individual heterozygous for a trait and an individual homozygous recessive for the trait are crossed and produce many offspring that are
a.
all the same genotype.
c.
of three different phenotypes.
b.
of two different phenotypes.
d.
all the same phenotype.
In humans, having freckles (F) is dominant to not having freckles (f). The inheritance of these traits can be studied using a Punnett square similar to the one shown below.
      evhm2gen-b_files/i0100000.jpg
12.
Refer to the illustration above. The genotype represented in box “1” in the Punnett square would
a.
be homozygous for freckles.
b.
have an extra freckles chromosome.
c.
be heterozygous for freckles.
d.
have freckles chromosomes.
13.
Refer to the illustration above. The genotype in box “3” of the Punnett square is
a.
FF.
c.
ff.
b.
Ff.
d.
None of the above
14.
How many different phenotypes can be produced by a pair of codominant alleles?
a.
1
c.
3
b.
2
d.
4
evhm2gen-b_files/i0130000.jpg
15.
Refer to the illustration above. The phenotype represented by the cell labeled “1” is
a.
green, inflated.
c.
yellow, inflated.
b.
green, constricted.
d.
yellow, constricted.
16.
2,000 yellow seeds : 8,000 total seeds ::
a.
1 : 6
c.
1 : 3
b.
1 : 8
d.
1 : 4
In rabbits, black fur (B) is dominant to brown fur (b). Consider the following cross between two rabbits.
      evhm2gen-b_files/i0160000.jpg
17.
Refer to the illustration above. Both of the parents in the cross are
a.
black.
c.
homozygous dominant.
b.
brown.
d.
homozygous recessive.
18.
Refer to the illustration above. The phenotype of the offspring indicated by box “3” would be
a.
brown.
c.
a mixture of brown and black.
b.
black.
d.
The phenotype cannot be determined.
19.
What is the expected phenotypic ratio resulting from a homozygous dominant ´ heterozygous monohybrid cross?
a.
1:3:1
c.
2:1
b.
1:2:1
d.
1:0
      evhm2gen-b_files/i0240000.jpg
20.
Refer to the illustration above. The phenotype represented by the cell labeled “1” is
a.
round, yellow.
c.
wrinkled, yellow.
b.
round, green.
d.
wrinkled, green.
21.
An organism that has inherited two of the same alleles of a gene from its parents is called
a.
hereditary.
c.
homozygous.
b.
heterozygous.
d.
a mutation.
22.
In pea plants, yellow seeds are dominant over green seeds. What would be the expected genotype ratio in a cross between a plant with green seeds and a plant that is heterozygous for seed color?
a.
1:3
c.
4:1
b.
1:2:1
d.
1:1
23.
codominance : both traits are displayed ::
a.
probability : crosses
b.
heterozygous : alleles are the same
c.
homozygous : alleles are the same
d.
Punnett square : chromosomes combine
24.
The difference between a monohybrid cross and a dihybrid cross is that
a.
monohybrid crosses involve traits for which only one allele exists, while dihybrid traits involve two alleles.
b.
monohybrid crosses involve self-pollination, while dihybrid crosses involve cross-pollination.
c.
monohybrid crosses involve one gene; dihybrid crosses involve two genes.
d.
dihybrid crosses require two Punnett squares; monohybrid crosses need only one.
25.
What fraction of the offspring resulting from a heterozygous ´ heterozygous dihybrid cross are heterozygous for both traits?
a.
9/16
c.
3/16
b.
1/4
d.
1/16

 
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Graph Example Quiz

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Line Graph of Temperatures

1. This graph shows the temperatures during the period of a

Week Month Year

2. The temperatures in the beginning of the week were rising or falling?

Rising Falling

3. There was the least amount of change between days

6 and 7

5 and 6

1 and two

4. If freezing is 32 degrees, which day was above freezing?

Day 1

Day 2

Day 4

5. When was the greatest drop in temperatures between?

Days 1 and 2

Days 3 and 4

Days 4 and 5

BAR GRAPH QUIZ

Click on the radio buttons in front of the correct answers to the questions about the graph.

Bar Graph

1. In the bar graph above, students favorite activity is

Using the computer

Visitng with friends

Earning money

2. According to the bar graph which is the least favorite after school activity?

Using on the computer

Visitng with friends

Earning money

3. Which two activities are favored by an equal number of students?

Playing sports and earning money

Using the computer and earning money

Talking on the phone and playing sports.

4. How many students said they their favorite after school activity is playing sports?

100 120 140

5. Based on this survey would you say more students like to be around people or be alone after school?

Be alone Be around people

Circle/Pie Graph Quiz

Click on the radio buttons in front of the correct answers to the questions.

Chart of Day's Activities

1. A part of a circle/pie graph that explains the colors that represent each part or slice of the graph is a

legend grid axis

2. These two activities took up half of the time of the day.

Entertainment and school

Meals and school

Sleep and school

3. These two activities took up the least amount of time.

Sleep and school

Meals and homework

Sleep and job

4. Which of these took up one fourth of the day?

Entertainment

Sleep

Homework

5. What percent of the day does homework take up?

2 8 25

6. Which of these takes up the same amount of time as meals and entertainment together?

Job

School

Homework

 

Genetics Tutorial

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Human Genetics Web Tutorial

 

 

 

True/False
Indicate whether the sentence or statement is true or false.
1.
Hemophilia is a recessive, sex-linked disorder.
2.
An autosomal trait will occur with equal frequency in both males and females.
3.
Sex-linkd traits appear more often in females than in males.
4.
An individual who expresses a genetic disorder is called a carrier.
5.
A male can produce sperm that contains either an X or a Y chromosome.
6.
Mutations are always harmful.
7.
A pedigree is a family record that shows how a trait is inherited over several generations.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
8.
Hemophilia is a genetic disorder that is
a.
sex-linked.
c.
fairly common.
b.
sex-influenced.
d.
more common in women than in men.
9.
Parents of a color blind female could have the genotypes
a.
XCXc and XCY
c.
XCXc and XcY
b.
XcXc and XCY
d.
XCXC and XcY
10.
People who are heterozygous for sickle cell anemia are
a.
partially resistant to the effect of ultraviolet radiation.
b.
totally resistant to the effect of ultraviolet radiation.
c.
partially resistant to malaria.
d.
totally resistant to malaria.
11.
Both sickle cell anemia and hemophilia
a.
are caused by genes coding for defective proteins.
b.
are seen in homozygous dominant individuals.
c.
provide resistance to malaria infections.
d.
are extremely common throughout the world.
12.
This genetic disease occurs most frequently in the black population.
a.
cystic fibrosis
c.
sickle-cell anemia
b.
Tay-Sachs disease
d.
hemophilia
13.
The trait for skin color in humans is cause by
a.
crossing-over
c.
nondisjunction
b.
multiple genes
d.
mutations
14.
A hereditary disease in which the red blood cells have an abnormal shape is
a.
galactosemia
c.
polydactyly
b.
Tay-Sachs disease
d.
sickle-cell anemia
15.
Sex-linked traits appear more often in males than in females because
a.
males are produced in greater numbers
b.
females with a sex-linked trait will die
c.
males have only one X chromosome
d.
sex-linked traits are carried on the Y chromosome
16.
A diagram in which several generations of a family and the occurrence of certain genetic characteristics are shown is called a
a.
Punnett square.
c.
pedigree.
b.
monohybrid cross.
d.
family karyotype.
17.
What is the percentage of chance that two people who carry a sickle-cell gene will have a child having the disease?
a.
0
c.
50
b.
25
d.
100
18.
Which genetic trait is most influenced by the environment?
a.
blood type
c.
baldness
b.
eye color
d.
weight
19.
Very dark-skinned people have alleles at all gene positions for skin color that code for
a.
red-green colorblindness.
c.
the production of Rh antigens.
b.
albinism.
d.
the production of melanin.
20.
Sex-linked traits such as color blindness
a.
are never carried by females
c.
occur more frequently in males
b.
occur more frequently in females
d.
never occur in males
21.
What would be the blood type of a person who inherited an A allele from one parent and an O allele from the other?
a.
type A
c.
type AB
b.
type B
d.
type O.
22.
Genetic counseling is a process that
a.
helps identify parents at risk for having children with genetic defects.
b.
assists parents in deciding whether or not to have children.
c.
uses a family pedigree.
d.
All of the above
23.
If both parents carry the recessive allele that causes cystic fibrosis, the chance that their child will develop the disease is
a.
one in two.
c.
two in five.
b.
one in four.
d.
100 percent.
24.
People with Down syndrome have
a.
45 chromosomes.
c.
47 chromosomes.
b.
46 chromosomes.
d.
no X chromosomes.
25.
If nondisjunction occurs,
a.
there will be too many gametes produced.
b.
no gametes will be produced.
c.
a gamete will receive too many or too few homologues of a chromosome.
d.
mitosis cannot take place.
26.
A human female inherits
a.
one copy of every gene located on each of the X chromosomes.
b.
twice as many sex chromosomes as a human male inherits.
c.
one copy of every gene located on the Y chromosome.
d.
all of the same genes that a human male inherits.
27.
A pedigree CANNOT be used to
a.
determine whether a trait is inherited.
b.
show how a trait is passed from one generation to the next.
c.
determine whether an allele is dominant or recessive.
d.
none of the above
28.
If a man with blood type A and a woman with blood type B produce an offspring, what might be the offspring’s blood type?
a.
AB or O
b.
A, B, or O
c.
A, B, AB, or O
d.
AB only
29.
Sickle cell disease is caused by a
a.
change in one DNA base.
b.
change in the size of a chromosome.
c.
change in two genes.
d.
change in the number of chromosomes in a cell.
30.
Many sex-linked genes are located on
a.
the autosomes.
b.
the X chromosome only.
c.
the Y chromosome only.
d.
both the X chromosome and the Y chromosome.

 
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