Where are gametophytes produced?
The male gametophyte is formed in the anthers of the stamens, and the female gametophyte is located in the ovules within the pistil. In the anther, four pollen sacs (locules) contain numerous microspore mother cells, each of which undergoes meiosis to produce four microspores in a tetrad (Figure 2A).
How male gametophyte is produced?
How does a male gametophyte develop? The pollen grains are released from the pollen-sacs at the two-celled stage. The generative cell further divides to form two male gametes. These male gametes are released into the embryo sac to undergo fusion with the egg and the central cell.
Where is female gametophyte produced?
the ovule
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.
Where do you find a male gametophyte in a flower?
stamens
Formation of the male gametophyte in flowering plants takes place within specialized male reproductive organs called the stamens and consists of two distinct sequential phases, microsporogenesis and microgametogenesis (Fig. 1).
How are gametophytes formed?
How Are Gametophytes Produced? A gametophyte is created when the sporophyte generation produces spores. Spores are made by meiosis or cell division that reduces the number of chromosomes by half. Remember, sporophytes are diploid, so if a diploid cell undergoes meiosis, it will produce haploid cells.
How are male and female gametophyte produced?
The male gametophyte develops inside the pollen grain. The female gametophyte develops inside the ovule. In flowering plants, gametophyte phases are reduced to a few cells dependant for their nutrition on the sporophyte phase.
Which cell of male gametophyte produces the male gamete?
generative cell
male gamete is produced by generative cell of male gametophyte.
Where do male and female gametophytes develop in gymnosperms?
cones
In gymnosperms, a leafy green sporophyte generates cones containing male and female gametophytes; female cones are bigger than male cones and are located higher up in the tree. A male cone contains microsporophylls where male gametophytes ( pollen ) are produced and are later carried by wind to female gametophytes.
What is the male gametophyte in plants?
pollen grain
The highly reduced male gametophyte of angiosperm plants is a two- or three-celled pollen grain. Its task is the production of two male gametes and their transport to the female gametophyte, the embryo sac, where double fertilization takes place.
What is the male gametophyte in angiosperms?
Pollen
The male gametophyte of angiosperm is Pollen after germination. Megagametophyte is the egg which produces gametophyte and the sperm which produces gametophyte is known as the microgametophyte.
What is the source of the male gametophyte in a seed plant?
Pollen grains are the male gametophytes in flowering plants. Inside the pollen grain, the microspore divides to form two cells, a tube cell and a cell that will act as the sperm.
What are male gametophytes?
The highly reduced male gametophyte of angiosperm plants is a two- or three-celled pollen grain. Its task is the production of two male gametes and their transport to the female gametophyte, the embryo sac, where double fertilization takes place.
What is the difference between male and female gametophyte?
Male and female gametophyte are the two types of gametophytes produced by heterosporous plants.
What develops into male gametophytes?
Flower Structure.
What is produced by the gametophyte generation?
The plant life cycle alternates between a gametophyte phase and a sporophyte phase in a cycle known as alternation of generations.
Why is gametophyte dominant in Moss?
Why is Gametophyte dominant in Moss? Alternation of Generations. In bryophytes (mosses and liverworts), the dominant generation is haploid, so that the gametophyte comprises what we think of as the main plant. The opposite is true for tracheophytes (vascular plants), in which the diploid generation is dominant and the sporophyte comprises the
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