Formation of vegetative and generative cells, Biology

Formation of Vegetative and Generative Cells

The division of a pollen grain results in two unequal cells-the vegetative cell and the generative cell. The pollen grain is hereafter known as the male gametophyte because both the cells of this structure carry a single set of chromosomes. Do you recall that gametophyte represents the haploid generation of the life cycle of plant? The larger cell is the vegetative cell and it forms the pollen tube. The smaller cell is known as the generative cell and it produces two sperms by a mitotic division. The position of the generative cell is related to that of the microspore nucleus and the orientation of the spindle. In Figure that before division the pollen nucleus migrates to one side of the pollen grain and comes to rest near the wall. The division involves the formation of an unusual spindle structure.

260_Formation of Vegetative and Generative Cells.png

Figure: Formation of Vegetative and Generative Cells

Posted Date: 1/23/2013 1:29:21 AM | Location : United States







Related Discussions:- Formation of vegetative and generative cells, Assignment Help, Ask Question on Formation of vegetative and generative cells, Get Answer, Expert's Help, Formation of vegetative and generative cells Discussions

Write discussion on Formation of vegetative and generative cells
Your posts are moderated
Related Questions
Copper deficiency Copper deficiency may be primary or secondary (conditional). Primary copper deficiency occurs due to its inadequate dietary intake; whereas secondary copper d

Explain the Sub-Culturing? Microbiological studies require microorganisms in pure form, i.e., a single type of microorganisms should be present in a culture. Maintenance of the

Which of the following experimental steps permitted Hershey and Chase to verify that the transforming agent in a bacteriophage is DNA as well? A. Phage particles were mixed wit

From an ecological point of view, species richness alone has limited value. More meaningful measures use the number of different species in a given area (species richness) as well

Explain the primary function of blood? The primary function of the blood to transport oxygen from the lungs to body tissues for interior respiration. The blood helps in maintai

Mr. Jones I.V. was hung at noon. It is a liter bag and is infusing at 65 ml/hr. How many hours will this bag last?

Q. What is the kind of cell division that allows sexual reproduction? What is gametogenesis? Meiosis is the kind of cell division that permits sexual reproduction since it redu

Using the words 'cilia' and 'mucus', describe, very briefly, how the body gets rid of dust which enters the lungs. The lining of the air passages makes mucus which traps dust p

Absence of Passive Fit of the Prosthesis A passive fit of the prosthesis reduces long term stresses in the superstructure, implant components and the bone adjacent to the impla

Benefits of Exercises Benefits of exercises for a diabetic patient are given below: - Improves sugar control. - Decreases HbA1C level. - Decreases blood pressure. -