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