Introducing C-Fern (Ceretopteris richardii)
!"#$%&'()*+$%,-'./,0(*/(1** 2/34%$*5/6$307893$#*! 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 Gametophyte Haploid (n) plant (n) Diploid (2n) Mitosis Sperm
Gametes (n) Egg Fig. 17-3-2
Key Gametophyte Haploid (n) plant (n) Diploid (2n) Mitosis Sperm
Gametes (n) Egg
Fertilization
Zygote (2n) Fig. 17-3-3
Key Gametophyte Haploid (n) plant (n) Diploid (2n) Mitosis Sperm
Gametes (n) Egg
Fertilization
Zygote (2n)
Mitosis Sporophyte plant (2n) Fig. 17-3-4
Key Gametophyte Haploid (n) plant (n) Diploid (2n) Mitosis Sperm
Spores (n) Gametes (n) Egg
Meiosis Fertilization
Zygote (2n)
Mitosis Sporophyte plant (2n) Fig. 17-3-5
Key Gametophyte Haploid (n) plant (n) Mitosis Diploid (2n) Mitosis Sperm
Spores (n) Gametes (n) Egg
Meiosis Fertilization
Zygote (2n)
Mitosis Sporophyte plant (2n) Haploid (n) Diploid (2n) Sperm (n) Mitosis and development Female gametangium (n)
Gametophyte (n) Spores (n) Egg (n)
Meiosis Fertilization
Clusters of sporangia 2 Zygote (2n) New sporophyte (2n)
3 Mitosis and development
Mature sporophyte Fig. 17-5-1 Key 1 Haploid (n) Sperm (n) Diploid (2n)
Archegonium (female gametangium) (n) Gametophyte (n)
Egg (n)
Fertilization Fig. 17-5-2 Key 1 Haploid (n) Sperm (n) Diploid (2n)
Female gametangium (n)
Gametophyte (n)
Egg (n)
Fertilization
2 Zygote (2n) Fig. 17-5-3 Key 1 Haploid (n) Sperm (n) Diploid (2n)
Female gametangium (n)
Gametophyte (n)
Egg (n)
Fertilization
Clusters of 4 sporangia 2 Zygote (2n) New sporophyte (2n)
3 Mitosis and development
Mature sporophyte Fig. 17-5-4 Key 1 Haploid (n) Sperm (n) Diploid (2n)
5 Mitosis and development Female gametangium (n)
Gametophyte (n) Spores (n) Egg (n)
Meiosis Fertilization
Clusters of 4 sporangia 2 Zygote (2n) New sporophyte (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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hermaphrodite Males! Wild and Mutant Phenotypes!
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mutant gametophytes Gametangia !
antheridia
archegonia Hermaphrodites! Wild and Mutant Phenotypes!
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