Introducing C-Fern
(Ceretopteris richardii)
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Life Cycle of Plants!
Terminology:
alternation of generations:
plants have two distinct
generations that alternate
in producing each other
gametophyte: haploid (n)
produces gametes
sporophyte: diploid (2n)
produces spores
Fig. 17-3-1
Key
Haploid (n)
Diploid (2n)
Gametophyte
plant (n)
Mitosis
Gametes (n)
Sperm
Egg
Fig. 17-3-2
Key
Haploid (n)
Diploid (2n)
Gametophyte
plant (n)
Mitosis
Gametes (n)
Sperm
Egg
Fertilization
Zygote (2n)
Fig. 17-3-3
Key
Haploid (n)
Gametophyte
plant (n)
Mitosis
Diploid (2n)
Gametes (n)
Sperm
Egg
Fertilization
Zygote (2n)
Mitosis
Sporophyte
plant (2n)
Fig. 17-3-4
Key
Haploid (n)
Gametophyte
plant (n)
Mitosis
Diploid (2n)
Spores (n)
Gametes (n)
Sperm
Egg
Fertilization
Meiosis
Zygote (2n)
Mitosis
Sporophyte
plant (2n)
Fig. 17-3-5
Key
Haploid (n)
Diploid (2n)
Gametophyte
plant (n)
Mitosis
Spores (n)
Mitosis
Gametes (n)
Sperm
Egg
Fertilization
Meiosis
Zygote (2n)
Mitosis
Sporophyte
plant (2n)
Haploid (n)
Diploid (2n)
Sperm (n)
Mitosis and
development
Female
gametangium (n)
Gametophyte (n)
Spores (n)
Egg (n)
Fertilization
Meiosis
Clusters of
sporangia
2
New sporophyte (2n)
Zygote (2n)
3 Mitosis and
development
Mature sporophyte
Fig. 17-5-1
Key
Haploid (n)
Diploid (2n)
1
Sperm (n)
Archegonium
(female
gametangium) (n)
Gametophyte (n)
Egg (n)
Fertilization
Fig. 17-5-2
Key
Haploid (n)
Diploid (2n)
1
Sperm (n)
Female
gametangium (n)
Gametophyte (n)
Egg (n)
Fertilization
2
Zygote (2n)
Fig. 17-5-3
Key
Haploid (n)
Diploid (2n)
1
Sperm (n)
Female
gametangium (n)
Gametophyte (n)
Egg (n)
Fertilization
4
Clusters of
sporangia
2
New sporophyte (2n)
Zygote (2n)
3 Mitosis and
development
Mature sporophyte
Fig. 17-5-4
Key
Haploid (n)
Diploid (2n)
1
Sperm (n)
5 Mitosis and
Female
gametangium (n)
development
Gametophyte (n)
Spores (n)
Egg (n)
Fertilization
Meiosis
4
Clusters of
sporangia
2
New sporophyte (2n)
Zygote (2n)
3 Mitosis and
development
Mature sporophyte
Sori and Sporangia: Spore-containing Structures!
Sori and Sporangium with Spores!
C-Fern!
Life Cycle!
Observing Gametophytes !
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C-fern Phenotypes!
hermaphrodite
Males!
Wild and Mutant Phenotypes!
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Hermaphrodites!
Mutant and Wild!
mutant
gametophytes
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wild
gametophyte
Gametangia !
antheridia
archegonia
Hermaphrodites!
Wild and Mutant Phenotypes!
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