Question: What process mitosis or meiosis would produce the pollen grain?

Microsporogenesis in the anther involves the meiotic division of pollen mother cells, which each produce four microspores. These then undergo mitosis to form pollen grains (microgametophytes), which at maturity consist of only three cells, the tube cell and two non-motile sperm cells.

Is pollen produced by meiosis or mitosis?

Pollen grains are produced by meiosis of microspore mother cells that are located along the inner edge of the anther sacs (microsporangia).

Does meiosis mitosis or both produce mature pollen grains?

Within the microsporangium, the microspore mother cell divides by meiosis to give rise to four microspores, each of which will ultimately form a pollen grain (Figure 6). … Mature pollen grains contain two cells: a generative cell and a pollen tube cell.

Is pollen a product of meiosis?

Cells called pollen mother cells undergo meiosis. If a plant is diploid, each haploid product of meiosis (unicellular microspore) divides mitotically, but asymmetrically, to give two haploid cells (bicellular pollen grain).

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How does a pollen grain formed?

Development of pollen grains (male gametophytes) takes place in the anther. Pollen development begins when specialized cells (microsporocytes) differentiate in young anthers. … The microspore then undergoes a highly unequal cell division producing a larger vegetative cell and a smaller generative cell.

Where the pollen grains are produced?

Where are pollen grains formed? In flowering plants, pollen grains are formed with the anther. If you look at the diagram to the right, you will see that the anther is a part of the stamen. Essentially, the anther is where the pollen grains are produced!

Which part of pollen grain produces pollen tube?

The vegetative cell then produces the pollen tube, a tubular protrusion from the pollen grain, which carries the sperm cells within its cytoplasm.

Does mitosis occur in pollen grains?

Pollen is produced in the anthers of the stamen, while the ovules are produced in the ovary of the carpel. … These then undergo mitosis to form pollen grains (microgametophytes), which at maturity consist of only three cells, the tube cell and two non-motile sperm cells.

Which of the following produces pollen grains in anther?

Option B: Anther is defined as that part of the stamen which produces pollen grains.

What is the process of transferring pollen grains from the anther to the stigma?

Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma.

What is found in pollen grains?

Each pollen grain contains male gametes necessary for fertilisation. … Each pollen grain is a single cell containing two male gametes. Once mature, the anther splits open and pollen is released. Both male gametes are involved in fertilisation, resulting in formation of a zygote and an endosperm.

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What means pollen grain?

Definition of pollen grain

: one of the granular microspores that occur in pollen and give rise to the male gametophyte of a seed plant.

What two cells come from the pollen grain?

Mature pollen grains contain two cells: a generative cell and a pollen tube cell. The generative cell is contained within the larger pollen tube cell.

How the pollen grain and embryo sac are formed?

Megaspores develop into embryo sacs, microspores into pollen grains. The pollen grains are released from the anther to land on a stigma during pollination. The pollen grain germinates, forming a pollen tube that delivers the sperm to the egg in the ovule during fertilization. The sporophyte embryo develops in the seed.

How many pollen grains are formed?

So each microspore forms 4 pollen grains in a single division.