What does the female gametophyte produce?
The mature female gametophyte secretes peptides that guide the pollen tube to the embryo sac and contains protein complexes that prevent seed development before fertilization.
How many cells are formed in female gametophyte?
There are usually 8 haploid cells in the female gametophyte of a flowering plant: 3 antipodal cells (at the opposite end of the embryo sac from the egg) 2 synergids flanking the egg (located at the micropylar end of the embryo sac)
What type of cells are produced during the gametophyte?
In the gametophyte phase, which is haploid (having a single set of chromosomes), male and female organs (gametangia) develop and produce eggs and sperm (gametes) through simple mitosis for sexual reproduction.
What are the 7 cells in a female gametophyte?
At FG6/FG7, the mature female gametophyte has seven cells: two synergids, egg cell, central cell with large diploid nucleus (central cell nucleus, or CCN), and three antipodal cells (which are present through FG7 though much diminished 8). Stages are numbered in accordance with Christensen et al. 4.
What develops in female gametophytes quizlet?
-inside ovule, female gametophyte develops from a megaspore and produces 1 or more eggs.
What do gametophytes produce?
The gametophyte produces structures known as antheridia and archegonia, which produce the male and female gametes respectively. Collectively these structures are known as gametangia.
How many cells do gametophytes have?
In each microspore, a single gametophyte is produced, consisting of four haploid cells produced by meiotic division of a diploid microspore mother cell.
What is the first cell of female gametophyte?
Functional megaspores
Megaspore mother cell of megasporangium undergoes meiosis. It forms megaspore tetrad out of which one megaspore is functional. Functional megaspores develop mitotically into the embryo sac. So, the functional megaspore serves as the first cell of the female gametophyte.
What does a gametophyte produce quizlet?
The gametophyte produces haploid gametes by mitosis 2. Two gametes unite (fertilization) and form a diploid zygote.
What is made by the gametophyte generation?
The sexual phase, called the gametophyte generation, produces gametes, or sex cells, and the asexual phase, or sporophyte generation, produces spores asexually. In terms of chromosomes, the gametophyte is haploid (has a single set of chromosomes), and the sporophyte is diploid (has a double set).
What does the Megasporocyte produce?
The megasporocyte is a single cell that undergoes meiosis, producing a tetrad of four haploid megaspores, which in most extant seed plants are arranged in a straight line, or linearly (Figure 5.10A).
How many times does megaspore divide mitotically to produce 8 haploid nuclei?
The haploid megaspore undergoes three rounds of mitotic divisions that result in eight haploid nuclei contained in seven cells: Two synergids, one egg cell, a central cell with two nuclei, and three antipodals.