1. Magnoliophyta

2. Magnoliposida
The dicotyledons

3. Liliopsida
The monocotyledons

5. stigma
style
ovary
The carpel
ovule
megasporocyte
micropyle

6. Creation of the megaspore

7. megaspore
Creation of the megaspore

8. Creation of the female gametophyte

9. antipodals
Polar
nuclei
synergids
Egg
nucleus
Creation of the female gametophyte

10. antipodals
Polar
nuclei
synergids
Egg
cell
Mature female gametophyte = embryo sac

11. Review:
meiosis
Megasporocyte
(2N)
Megaspore
(N)
Mitosis and rearrangement
Megaspore
(N)
Female gametophyte
(N)
Female gametophyte contains the egg cell

12. Stamen
anther
filament

13. Pollen sac
microsporocyte
Cross section of an anther

14. microspore
microsporocyte
Creation of microspores

15. Review:
meiosis
microsporocyte
microspore
Creation of microspores
Next step: creation of male gametophyte

16. exine

17. Tube cell
nucleus
Generative cell
Pollen grain

18. pollination

19. Pollen germination
Generative
nucleus
Tube nucleus

20. sperm
Tube nucleus

21. Mature
Male gametophyte
sperm
Tube nucleus

22. Review:
meiosis
microsporocyte
(2N)
microspore
(N)
Mitosis and rearrangement
microspore
(N)
Male gametophyte
(N)
Male gametophyte contains the sperm

23. antipodals
Polar
nuclei
synergids
Egg
cell
Tube nucleus
sperm

24. antipodals
Polar
nuclei
synergids
Egg
cell
Tube nucleus
sperm

25. 3N
Primary
endosperm
nucleus
Polar
nuclei 2N
Zygote
Egg
cell
Double Fertilization

26. Seed coat
endosperm
embryo
fruit