Non-recurrent type, Biology

Non-recurrent Type

As mentioned earlier it refers to embryo development in reduced embryo sacs. The mechanisms identified for such cases are:

  • Reduced Pseudogamy: The reduced egg develops in a pseudogamous, and parthenogenic manner. The pollen tube enters normally but the male gamete fails to fuse with the egg and disintegrates in the cytoplasm of egg.
  • Reduced Parthenogenesis: Embryo development is accomplished by heat or cold treatment.
  • Androgenesis: The egg nucleus degenerates, the sperm nucleus functions in the cytoplasm of the egg and produces the embryo.
Posted Date: 1/23/2013 6:20:27 AM | Location : United States







Related Discussions:- Non-recurrent type, Assignment Help, Ask Question on Non-recurrent type, Get Answer, Expert's Help, Non-recurrent type Discussions

Write discussion on Non-recurrent type
Your posts are moderated
Related Questions
Explain nutritional properties of the eggs Drying of eggs under normal conditions causes little loss of the nutritional properties of the eggs. Vitamin A, vitamin B, thiamine,

Explain about the Dietary Reference Intakes? Dietary Reference Intakes (DRIs) are relatively new to the field of nutrition. The DRIs are a set of four nutrient-based reference

Define Adsorption chromatography - Basic Separation Technique? Adsorption is surface interaction and is by number of forces, between surface atoms of solids and molecules of ex

Functions of Endosperm The tissue of young endosperm is rich in food materials and various growth hormones. It regulates the precise mode of embryo development and nourishes

Pre-Embryo - Human Development About thirty hours after fertilization the zygote goes through mitosis giving rise to 2 blastomeres. These blastomeres go through further cleava

Explain the Food Intolerance? What is food intolerance? How does it differ from food allergy? Food intolerance like food allergy is an adverse reaction to food. Food intoleranc

State the the amount of the nutrient On increasing the amount of the nutrient the yield increases and the decrease from the maximum i.e., (A-y) becomes less. Subsequent additio

Which of the following best explains what would happen if recombination (crossing-over) happens during mitotic prophase? A. Recombination during mitosis will lead to segregatio

What is the valve that separates the stomach from the esophagus called? What is its function? The valve that separates the stomach from the esophagus is the cardia. It has the

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4