What is the gametophyte structure of a fern?
Gametophyte (prothallus) The prothallus is the fern gametophyte. It is a green, photosynthetic structure that is one cell thick, usually heart or kidney shaped, 3–10 mm long and 2–8 mm broad. It is very difficult to find in the bush as it is so tiny.
Are C-Fern gametophytes haploid?
As a homosporous fern, C-Fern has two independent, autotrophic phases: a developmentally simple haploid gametophyte and a vascular diploid sporophyte.
How many gametophytes do ferns have?
Ferns and horsetails have two free-living generations: a diploid sporophyte generation (spore-producing plant) and. a haploid gametophyte generation (gamete-producing plant).
What is C-Fern?
C-Fern® is a specially derived cultivar of an unusual tropical fern, Ceratopteris richardii. C-Fern is a unique teacher and student-friendly instructional tool for the Biology classroom that is easy to grow and observe.
Is fern sporophyte dependent on gametophyte?
The sporophyte generation is dependent on the photosynthetic gametophyte for nutrition. Cells within the sporangium of the sporophyte undergo meiosis to produce male and female spores, respectively.
Is a fern a sporophyte or gametophyte?
sporophyte
Life cycle. The typical fern, a sporophyte, consists of stem, leaf, and root; it produces spores; and its cells each have two sets of chromosomes, one set from the egg and one from the sperm.
Are C Fern gametophytes multicellular?
c)Plant gametophytes are haploid multicellular bodies.
Are C fern gametophytes multicellular?
Are C Fern Sporophytes multicellular?
When talking about specific life cycles, all land plants alternate between two generations. Ferns are multicellular organisms and occur in both sporophyte and gametophyte during their life cycle.
What is the relationship of the fern gametophyte and sporophyte?
The life cycle of the fern has two different stages; sporophyte, which releases spores, and gametophyte, which releases gametes. Gametophyte plants are haploid, sporophyte plants diploid. This type of life cycle is called alternation of generations.
Do fern spores belong to the gametophyte or sporophyte generation?
Ferns follow a pattern of development similar to that of mosses, although most (but not all) ferns are homosporous. That is, the sporophyte produces only one type of spore within a structure called the sporangium (Figure 20.3). One gametophyte can produce both male and female sex organs.
Are ferns gametophyte or sporophyte dominant?
In higher plants like ferns and fern allies, the sporophyte stage is dominant. Gametophytes produce gametes (sperm and eggs) in a special structure called a gametangium (-ia), while sporophytes produce spores in a special structure called a sporangium (-ia).
What determines initial spore density among C-fern sporophytes?
Male gametophyte growth as a factor of initial spore density among C-fern sporophytes. ABSTRACT: C-fern spores have the ability of exhibiting both male and hermaphroditic sexes. Hermaphroditic gametophytes are always developed first, and if they release enough of the pheromone antheridiogen, male gametophytes will develop.
Is C fern spore male or female?
The C-fern spore is a species that is capable of developing as a male or hermaphrodite gametophyte and, because of this, is useful for studying sex determination (Hickok 1998). Sex is determined by the pheromone antheridiogen and are easily distinguished by size and shape (Banks 1997).
How do you find the initial density of gametophytes?
The initial density was determined by counting the number of spores in each dish under a dissection microscope, then dividing that number by the area of the dish. In week two, the number of gametophytes were counted and density was calculated again and continued to incubate for the third week.
Are C-fern spores hermaphroditic?
C-fern spores have the ability of exhibiting both male and hermaphroditic sexes. Hermaphroditic gametophytes are always developed first, and if they release enough of the pheromone antheridiogen, male gametophytes will develop.