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Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
Embryonic Development
 Fertilization
 Cleavage
 Differentiation
 Growth & Development
 Childbirth
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
Fertilization
 The egg is viable for 12 to 24 hours after
ovulation
 Sperm are viable for 12 to 48 hours after
ejaculation
 Sperm cells must make their way to the
Fallopian tube for fertilization to be possible
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
Fertilization
•
•
•
•
Fertilization: the sperm and egg join in the fallopian tube to
form a unique human being
zygote
Fertilization occurs in the Fallopian Tubes
Forty-six chromosomes combine.
Beginning of human development
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
Fertilization
1.
2.
3.
4.
Label the cells as haploid (1 set of chromosomes) or diploid (2 sets of chromosomes)
Write the number of chromosomes of each cell.
What is the name of this process?
Complete the sentence:
Fertilization
sperm
egg
____________ is the process of a _____________
joining a (an) ____________
Haploid
23 chromosomes
fertilization
Diploid
46 chromosomes
Haploid
23 chromosomes
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
The zygote
 First cell of a new individual
 The result of the fusion of DNA from sperm
and egg
 The zygote begins rapid mitotic cell divisions
 The zygote stage is in the Fallopian tube,
moving toward the uterus
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
The zygote
Identify the kind of cells
represented by the
numbers in the diagram
1
2
3
4
Sperm
Egg
Number of sets
of chromosomes?
1 set
1 set
Zygote
2 sets
Zygote
2 sets
Haploid or diploid?
haploid
haploid
diploid
diploid
Name of the process represented
by numbers
1+2
Fertilization
Name of the process represented
by numbers
3 to 4
Mitosis
or
Mitotic Cell Division
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
a)
Name of the cell #1 & # 2 Body Cells
b)
Number of chromosomes of cell #1 & #2 46 chromosomes (2 sets)
c)
Name of the processes A & B meiosis
d)
Where does the process A take place? testes
e)
Where does the process B take place? ovaries
f)
Name of the cell # 3 sperm
g)
Number of chromosomes of cell #3 23 chromosomes (1 set)
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
h. Name of the cell # 4 Egg
i. Number of chromosomes of cell # 4 23 chromosomes (1 set)
j. Name of process C fertilization
k. Where does the process C take place? Fallopian tubes
l. Name of the cell # 5
Zygote
m. Number of chromosomes of cell #5 46 chromosomes (2 sets)
n. Name of process D Growth by mitosis
o. Name of the cell # 6 Body cells
p. Number of chromosomes of cell # 6 46 chromosomes (2 sets)
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
Meiosis
Four
different
Crossing
over
Meiosis
Four only
one viable
Fertilization
one
Mitosis
two
different
different
identical
Crossing
over
No
No
Gametes
for sexual reproduction
Zygote
to develop
new individual
Body Cells
Objective: Understand the Stages of Pregnancy and Development
Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes
Body Cell Body Cell Sperm
Egg
Zygote
Body Cell
2 sets
2 sets
1 set
1 set
2 sets
2 sets
diploid
diploid
haploid
haploid
diploid
diploid