What is the gametophyte in seed plants?
The gametophyte is the sexual phase in the life cycle of plants and algae. It develops sex organs that produce gametes, haploid sex cells that participate in fertilization to form a diploid zygote which has a double set of chromosomes.
What is the female gametophyte in seed plants?
The female gametophyte develops within the ovule and generally consists of three antipodal cells, one central cell, two synergid cells, and one egg cell (Figures 1A and 1B). The female gametophyte is also commonly called the embryo sac or megagametophyte.Dec 26, 2011
What houses the female gametophyte in seed plants?
The development of the female gametophyte of seed plants occurs in an ovule, inside the megasporangium that develops in the ovule. In seed plants, the megasporangium is called a nucellus, and in some groups, the nucellus remains as a feature of the fully developed seed.
Is a seed a female gametophyte or sporophyte?
A gametophyte is a gamete-producing structure and is a haploid (n). The sporophyte is the zygote formed as a result of the fusion of male and female gametes and is diploid (2n). A seed contains the diploid embryo. It germinates to become a sporophyte.
What are the female and male gametophytes in seed plants?
The gametophytes of seed plants are microscopic. The female gametophyte consists of a handful of cells buried in the tissues of the sporophyte. The male gametophyte, the pollen grain, has a brief free-living stage while it is carried from plant to plant by wind, water, or animals.
What is the male gametophyte in seed plants?
The male gametophyte of seed plants is pollen, an organism of 3-6 cells that initiates its development from a spore on one sporophyte plant and completes its development on another sporophyte plant, in a location near that of the female gametophyte.
What is the male and female gametophyte in seeded plants and which structures produce them?
Sexual reproduction. The gametophyte is the dominant life phase in the Bryophytes. The gametophyte produces structures known as antheridia and archegonia, which produce the male and female gametes respectively. Collectively these structures are known as gametangia.