9.0 Reproduction & Development€¦ · 9.1 Sexual Reproduction In Flowering Plants: Learning...
Transcript of 9.0 Reproduction & Development€¦ · 9.1 Sexual Reproduction In Flowering Plants: Learning...
9.0 Reproduction & Development
Sexual Reproduction in Flowering Plants
Human Reproductive System
Fertilization and FoetalDevelopment
Roles of Hormones during Pregnancy & Parturition
9.0 Reproduction And DevelopmentSexual
Reproduction in Flowering Plants
Terminologies in gamete formation [C1]
Development of pollen grains and formation of male gamete
[C2]
Development of ovule, embryo sac and formation of female
gamete [C2]
Sexual Reproduction in
Animal
Human Reproductive
System: male and female
Fertilization and foetal development
Roles of hormones during pregnancy &
parturitionDouble fertilization in the formation of seed [C2]
9.1 Sexual Reproduction In Flowering Plants:
Learning Outcome
At the end of the lesson, students should beable to:
• State and define the terminologies involve ingamete formation in flowering plants [C1]:
• Male gamete: microsporangium / pollen sac,microsporocyte / microspore mother cell,microspore, tetrad, pollen grain/malegametophyte, generative cell, tube cell
• Female gamete: megasporangium,megasporocyte / megaspore mother cell,megaspore, female gametophyte / embryo sac,antipodal cell, polar nuclei, egg cell, synergid cell
9.1 Sexual Reproduction In Flowering Plants:
Learning Outcome
At the end of the lesson, students should beable to:
• Explain the development of a pollen grain andformation of male gamete [C2]
• Explain the development of ovule, embryo sacand formation of female gamete [C2]
• Explain double fertilization in the formation ofseed [C2]
Reproductive structure of flowering plants
1.
microsporangium
/pollen sac
2.
microsporocyte
/microspore
mother cell
5.
pollen grain /
male
gametophyte
6.
generative
cell
7.
tube cell4.
tetrad3.
microspore
Terminologies: Male gamete
Terminologies: Male gamete
A reproductive
structure in
heterosporous plants
that produce
microspores
A haploid spore in
heterosporous plants
that give rise to a
male gametophyte
A diploid cell in
microsporangium
that undergoes
meiosis to produce
four haploid
microspores
A group of four
haploid cells form at
the end of the
second division of meiosis
Terminologies: Male gamete
The immature male
gametophyte of seed
plants that produce
sperm capable for
fertilization
Cell in pollen grain
that divides by
mitosis to produce
two male gametes
Cell in pollen grain
that produce pollen
tube through which
the sperm cells travel
to reach the egg in
ovule
Terminologies: Female gamete
1.
megasporangium
2.
megasporocyte
/ megaspore
mother cell
4.
female
gametophyte
/ embryo sac
6.polar nuclei
7.
egg cell
5.
antipodal
cell
8.
synergid
cell3.
megaspore
Terminologies: Female gamete
A reproductive structure
in heterosporous plants
in which megaspores
are produced
A diploid cell within
megasporangium that
undergoes meiosis to
produce four haploid
megaspores
A haploid spore in
heterosporous plants
that develops into a
female gametophyte
Female gametophyte
generation produced after
megaspore undergoes
mitosis three times
Terminologies: Female gameteThe three haploid cells in
mature embryo sac of
flowering plants that are
situated at the opposite end of
micropyle
Two haploid nuclei in the
embryo sac that fuse with a
sperm during double
fertilization to form triploid
endosperm
The haploid mature female
reproductive cell that is
fertilized by a sperm to form a
diploid zygote
The two nuclei in the embryo
sac of flowering plants that
are closely associated with
egg cell to form the egg
apparatus
Development of pollen grain & formation of male gamete
Development of ovule, embryo sac & formation of female gamete
Ge
rmin
atio
n
Chalaza
end
Micropyle
Pollination
• After double fertilization, the ovule develops into a seed,integuments become testa and the ovary develops into a fruit enclosing the seed.
Double fertilization in the formation of seed
Next LectureHuman Reproductive System