WorksheetsReproduction and Fertilization
Total questions: 21
Worksheet time: 21mins
The graph below shows the relative concentrations of certain hormones in the blood during the human female reproductive cycle. Which hormone has the lowest concentration on which day?
hormone A on day 4
hormone B on day 2
hormone C on day 12
hormone D on day 20
Which sequence represents the order of some events in human development?
zygote → sperm → tissues → egg
fetus → tissues → zygote → egg
zygote → tissues → organs → fetus
sperm → zygote → organs → tissues
Human egg cells are most similar to human sperm cells in their
degree of motility
amount of stored food
chromosome number
shape and size
Sexual reproduction involves the processes listed below. Processes:
A. Differentiation B. Fertilization C. Gamete production D. Mitosis
A → B → C → D
B → A → C → D
C → B → D → A
D → B → C → A
A dogfish shark contains 24 chromosomes in each of its muscle cells. How many chromosomes are normally found in each of its gametes?
6
12
24
48
A species in a changing environment would have the best chance of survival as a result of a mutation that has a
high adaptive value and occurs in its skin cells
low adaptive value and occurs in its skin cells
high adaptive value and occurs in its gametes
low adaptive value and occurs in its gametes
Which statement concerning production of offspring is correct?
Production of offspring is necessary for a species to survive, but not necessary for an individual to
An organism can reproduce without performing any of the other life processes.
Production of offspring is necessary for an individual organism to survive, while the other life processes are important for a species to survive.
Reproduction is a process that requires gametes in all species.
Which sequence represents the correct order of processes that result in the formation and development of an embryo
meiosis → fertilization → mitosis
mitosis → fertilization → meiosis
fertilization → meiosis → mitosis
fertilization → mitosis → meiosis
Which is an immediate result of in vitro fertilization?
zygote
gamete
egg
ovary
In sexually reproducing species, the number of chromosomes in each body cell remains the same from one generation to the next as a direct result of
meiosis and fertilization
mitosis and mutation
differentiation and aging
homeostasis and dynamic equilibrium
In the diagram below, in which structure would homologous pairs of chromosomes normally be present?
1, only
2, only
3, only
either l or 2
In the diagram below of two homologous chromosomes, what do r and R represent?
two different alleles
two gametes that can form a zygote
two identical alleles
two chromosomes in a hybrid pea plant
The diagram below represents a pair of homologous autosomes. The letters B and b represent genes for a certain trait. These letters also represent
an allelic pair of genes
linked genes
genes for sex determination
homozygous genes
A
B
C
D
What statement best describes part of the human reproductive system?
Testosterone produced in A is transferred to D, where it influences embryonic development
Testosterone produced in D influences sperm formation in B
Estrogen and progesterone influence the activity of C
Progesterone influences the division of the egg in c
What processes could occur in individual 3?
production of sperm only
production of sperm and egg
production of egg and embryonic development
production of eggs only
What change would occur immediately if both structures labeled B were damaged or blocked?
Structure A would decrease in size.
The blood supply to structure E would decrease.
Gametes would no longer be transported to structure C.
Structure D would be able to deliver more gametes.
Base your answers to q 1 and 2 on the diagram.
1) In which structure do gametes usually unite to produce a zygote?
2) In which structure would both mitosis and differentiation of an embryo occur?
1. A
2. D
1. G
2. B
1. C
2. E
1. F
2. G
Which event would most probably result in the production of fraternal twins?
One egg is fertilized by two sperm cells.
Two egg cells are fertilized by one sperm cell.
Two egg cells are each fertilized by separate sperm cells.
Two eggs develop without fertilization.
Identical twins develop from
two zygotes that fuse during cleavage
two eggs fertilized by one sperm cell
one egg fertilized by two sperm cells
one zygote that divides into two parts
The major function of the placenta is to
cushion the fetus so it won't be hurt when the mother moves
exchange food, oxygen, and waste between mother and fetus
store food for the fetus
support the egg for the process of fertilization
