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WorksheetsTopic 8 - Asexual and Sexual Reproduction
Total questions: 29
Worksheet time: 15mins
Name
Class
Date
1.
A human zygote is produced from gametes that are usually identical in
a)
the expression of coded information
b)
the number of altered genes present
c)
chromosome number
d)
cell size
2.
Human egg cells are most similar to human sperm cells in their
a)
degree of motility
b)
amount of stored food
c)
chromosome number
d)
size and shape
3.
Which process normally occurs at the placenta?
a)
Oxygen diffuses from fetal blood to maternal blood.
b)
Materials are exchanged between fetal and maternal blood.
c)
Maternal blood is converted into fetal blood.
d)
Digestive enzymes pass from maternal blood to fetal blood.
4.
Which processes lead to the greatest variety of genetic combinations?
a)
asexual reproduction and cloning
b)
meiosis and fertilization
c)
meiosis and mitosis
d)
cloning and mitosis
5.
Potatoes were the main crop in Ireland in the 1800s. Almost the entire population of Ireland was dependent on a single variety of potato, the “lumper.” These potatoes were reproduced by a method of asexual reproduction known as vegetative propagation. In the middle of the 1800s, a disease caused by a fungus killed almost the entire lumper crop within two years. As a result, millions of people in Ireland died of starvation. The most likely reason the potato disease was able to destroy the potato crop in such a short time is that the
a)
potato population lacked variations
b)
lumper variety had a long reproductive cycle
c)
lumper had several variations caused by vegetative propagation
d)
potato population in Ireland utilized all of the finite resources
6.
Compared to a normal body cell, a normal egg cell contains
a)
the same number of chromosomes
b)
half the number of chromosomes
c)
twice the number of chromosomes
d)
four times the number of chromosomes
7.
A student made the drawing shown below of a single-celled organism as he observed it with a compound light microscope under the high-power objective (left picture).
Several minutes later, he drew the diagram shown below of the same organism, using the same magnification (right picture).
These drawings show that the organism is carrying out the process of
Several minutes later, he drew the diagram shown below of the same organism, using the same magnification (right picture).
These drawings show that the organism is carrying out the process of
a)
asexual reproduction
b)
genetic alteration
c)
sexual reproduction
d)
embryo formation
8.
Which structure is correctly paired with its function?
a)
ovary — provides milk for newborns
b)
testis — development of sperm
c)
placenta — storage of released eggs
d)
uterus — produces estrogen
9.
Which process allows a mammal to continue to grow in size?
a)
mitosis of sex cells
b)
mitosis of body cells
c)
meiosis of sex cells
d)
meiosis of body cells
10.
The diagram represents some stages that occur in the formation of an embryo.
Which statement best describes stage X?
Which statement best describes stage X?
a)
Stage X is a zygote and contains half the number of chromosomes as the body cells of the parents.
b)
Stage X is formed by the process of meiosis and is known as a gamete.
c)
Stage X is a zygote and is formed as a result of the process of fertilization.
d)
Stage X is formed by mitosis and is known as an egg cell.
11.
An organism that reproduces asexually will have offspring that have
a)
the same genetic information as both of its parents
b)
different genetic information from either of its parents
c)
the same genes as its parent
d)
different genes from its parent
12.
Which situation would be part of the normal reproductive cycle of a human?
a)
the presence of testosterone regulatinggamete production in a male
b)
estrogen in concentrations that would produce sperm in a female
c)
a high progesterone level in a male
d)
a low insulin level in either a male or a female
13.
Which organism would most likely have new gene combinations?
a)
a frog that was produced from a skin cell of a frog
b)
a hamster resulting from sexual reproduction
c)
a bacterium resulting from asexual reproduction
d)
a starfish that grew from part of a starfish
14.
Which sequence correctly represents the arrangement of structures containing genetic material, from the largest to the smallest size?
a)
chromosome --> gene --> nucleus
b)
nucleus --> chromosome --> gene
c)
gene --> chromosome --> nucleus
d)
gene --> nucleus --> chromosome
15.
The major function of the placenta is to
a)
cushion the fetus so it won’t be hurt when the mother moves
b)
exchange food, oxygen, and waste between mother and fetus
c)
store food for the fetus
d)
support the egg for the process of fertilization
16.
Sexual reproduction in a species usually results in
a)
an increase in the chromosome number in the offspring
b)
offspring genetically identical to the parent
c)
recombination of genes
d)
a decrease in biodiversity
17.
Exposure to toxins during early stages of pregnancy is more likely to cause birth defects than exposure in late pregnancy because
a)
essential organs form during early development
b)
the uterus provides more protection in late pregnancy
c)
the placenta forms during late pregnancy
d)
meiosis occurs rapidly during early development
18.
A scientist wants to change the DNA of a sexually reproducing organism and have the new DNA present in every cell of the organism. In order to do this after fertilization, she would change the DNA in the
a)
zygote
b)
placenta
c)
testes of the father
d)
ovaries of the mother
19.
The diagram represents part of a human reproductive system.
One of the functions of this part of the system is to
One of the functions of this part of the system is to
a)
supply essential nutrients to the offspring in the form of milk
b)
provide nutritional support for the embryo
c)
provide a structure that allows the mixing of maternal and fetal blood
d)
produce specialized proteins used in the production and release of sperm
20.
Abnormalities present in the cells that line the uterus may prevent the production of offspring by directly interfering with the
a)
development of the embryo
b)
differentiation of gametes into zygotes
c)
secretion of estrogen by the ovary
d)
production and release of egg cells
21.
The bud shown in the diagram below was produced by asexual reproduction.
Which process is responsible for the formation of the bud?
Which process is responsible for the formation of the bud?
a)
fertilization
b)
recombination
c)
mitosis
d)
meiosis
22.
The diagram below represents the banding pattern for human chromosome 11, with some of the bands labeled.
The bands represent
The bands represent
a)
proteins
b)
genes
c)
starches
d)
enzymes
23.
The diagram represents the reproductive cycle of a squirrel species with 40 chromosomes in each zygote.
A process that could be represented by A is
A process that could be represented by A is
a)
fertilization
b)
meiosis
c)
mitosis
d)
mutation
24.
The diagram represents the reproductive cycle of a squirrel species with 40 chromosomes in each zygote.
A liver cell in this species of squirrel would have
A liver cell in this species of squirrel would have
a)
20 chromosomes
b)
40 chromosomes
c)
60 chromosomes
d)
80 chromosomes
25.
The diagram represents the reproductive systems of the human female and male.
In which structure would both mitosis and differentiation of an embryo occur?
In which structure would both mitosis and differentiation of an embryo occur?
a)
G
b)
B
c)
E
d)
D
26.
The diagram represents the reproductive systems of the human female and male.
In which structure do gametes usually unite to produce a zygote?
In which structure do gametes usually unite to produce a zygote?
a)
A
b)
G
c)
C
d)
F
27.
The letters in the diagram indicate structures present in a human male.
Which structure produces the male hormone responsible for characteristics such as muscle development, deep voice, and gamete production?
Which structure produces the male hormone responsible for characteristics such as muscle development, deep voice, and gamete production?
a)
A
b)
B
c)
E
d)
D
28.
The letters in the diagram indicate structures present in a human male.
What change would occur immediately if both structures labeled B were damaged or blocked?
What change would occur immediately if both structures labeled B were damaged or blocked?
a)
Structure A would decrease in size.
b)
The blood supply to structure E would decrease.
c)
Gametes would no longer be transported to structure C.
d)
Structure D would be able to deliver more gametes.
29.
Which row in the chart indicates the correct process for each event indicated?
a)
1
b)
2
c)
3
d)
4
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