In sporic meiosis (also commonly known as intermediary meiosis), the zygote divides mitotically to produce a multicellular diploid sporophyte. The sporophyte creates spores via meiosis which also then divide mitotically producing haploid individuals called gametophytes.
What is the difference between zygotic and Sporic life cycles?
In the gametic life cycle, the gamete (egg or sperm) is the only haploid cell produced. In the zygotic life cycle, the zygote is the only diploid cell produced. In the sporic life cycle, you see alternating multicelled 2n and 1n generations.
What organisms use Sporic meiosis?
The sporic life cycle is common algae and plants. The term sporic refers to the fact that spores are the result of meiosis.
What is zygotic meiosis and gametic meiosis?
Two types of life cycle are zygotic meiosis and gametic meiosis. … The zygote is the only diploid (2n) stage that divides by meiosis (that is why called zygotic meiosis) and again produces vegetative cells with 1n chromosome number. Gametic Meiosis :The organism spends most of its life cycle in the 2n condition.
Where does meiosis occur in Sporophytic organism?
Meiosis occurs within sporangia, located on the underside of the sporophyte leaf. After the spores are released they germinate, divide by mitosis and grow into simple heartshaped gametophytes. On the gametophyte, cells in the archegonium and antheridium form the eggs and sperm.
What is the difference between zygotic meiosis and Sporic meiosis?
Zygotic meiosis and gametic meiosis have one mitotic stage: mitosis occurs during the n phase in zygotic meiosis and during the 2n phase in gametic meiosis. … Sporic meiosis, on the other hand, has mitosis in two stages, both the diploid and haploid stages, termed “diplobiontic” (not to be confused with diplontic).
What is the difference between Sporic meiosis and gametic meiosis?
The key difference between gametic sporic and zygotic meiosis is that gametic meiosis is the meiosis that occurs during the formation of male and female gametes while sporic meiosis is the meiosis that occurs during the sporogenesis and zygotic meiosis is the meiosis that occurs in the zygote.
Do land plants have a Sporic life cycle?
The land plant life cycle is known as a sporic (for sporic meiosis), dibiontic, or haplodiplontic life cycle. This type of life cycle exhibits alternation of generations. … These organisms, or generations, are called the sporophyte (spore-producing plant) and the gametophyte (gamete-producing plant).
Do gymnosperms show Sporic meiosis?
In bryophytes and pteridophyte- Sporic meiosis takes place. It produces haploid spores. And each spore gives rise to gametophyte body. … So that meiosis in gymnosperms is considered as gametic meiosis.
What happens in Karyogamy?
Karyogamy is the final step in the process of fusing together two haploid eukaryotic cells, and refers specifically to the fusion of the two nuclei. … In order for karyogamy to occur, the cell membrane and cytoplasm of each cell must fuse with the other in a process known as plasmogamy.
What does Gametic mean?
(găm′ēt′, gə-mēt′) A reproductive cell having the haploid number of chromosomes, especially a mature sperm or egg capable of fusing with a gamete of the opposite sex to produce a zygote.
What shows zygotic meiosis?
Chlamydomonas has haplontic life cycle hence showing zygotic meiosis or initial meiosis.
Do bryophytes show zygotic meiosis?
Thinking Process All algae except Fucus, Ectocarpus, Dictyota and a few other, show haplontic life cycle or zygotic meiosis, Bryophytes and pteridophytes show haplodiplontic life cycle and undergo sporic meiosis.
What is Sporophytic and Gametophytic?
Both Gametophyte and Sporophyte are the two Generations of a plant. Gametophyte: Gameto means gametes and phyte means plants. The generation of plants that forms gametes is called gametophyte. Plants produce gametes with the help of their sex organs. … The generation of plants that produce spores is called sporophyte.
What is Sporophytic cells?
A sporophyte (/ˈspɔːr. əˌfaɪt/) is the diploid multicellular stage in the life cycle of a plant or alga. It develops from the zygote produced when a haploid egg cell is fertilized by a haploid sperm and each sporophyte cell therefore has a double set of chromosomes, one set from each parent.
What are Sporophytic fungi?
Upon reaching reproductive maturity, the sporophyte produces spores, and the cycle starts again. This multigenerational life cycle is called alternation of generations; it occurs in some protists and fungi as well as in plants.