Already have an account? Get multiple benefits of using own account!
Login in your account..!
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Inter specific Incompatibility
This type of incompatibility is characterized by the prevention of fusion of gametes between members of different species. The incompatibility factors also operate after fertilization and cause eventual breakdown and failure of embryo development. The factors that prevent seed set following inter specific crosses have not been worked out. It is however apparent that rejection reaction may operate at any level. In Petunia the morphological abnormalities of the pollen tube are similar in both self and inter-generic incompatibility.
The inhibition may result from unilateral incompatibility, or incongruity or a passive rejection may operate. Inter specific incompatibility involves non-proteinaceous substances besides the stigma surface proteins. Phenolics and carbohydrates also seem to play an important role. It is believed that more than one gene at different loci controls the inter specific incompatibility. In crosses between incompatible species either fertilisation does not occur or the hybrid embryo aborts due to either inadequate development of endosperm or lack of support from endosperm.
Spiral Cleavage - Metazoa In Spiral Cleavage, however, the third and fourth cleavage planes are oblique to the polar axis and the resulting blastomeres do not lie on top of on
Issues Impacting Health and Development Poverty and malnutrition are the leading causes of high maternal and child mortality rates in developing countries. Together, they seri
The principal nitrogenous excretory compound in humans is synthesised: 1. in kidneys but eliminated mostly through liver 2. in kidneys as well as eliminated by kidneys 3.
Q.How is it produced and what is the function of gastrin in the digestive process? The existence of food in the stomach stimulates the secretion of gastrin that in its turn tri
Q. What is the life cycle of Trypanosoma cruzi? The Trypanosoma cruzi is a heteroxenous parasite that is it has an intermediate host, the triatomine bug, and a definitive host,
What does skin color in man shows?
Explain about the Radiation Therapy? Radiation therapy is one of the options for the treatment of various tumors. During the administration of radiation patients experience acu
Purpose of Supervision: Purpose: To help the personnel to grow, to know themselves and what they need in order to render the most efficient service and to give them assistance
Q. What is Constrictive pericarditis? Constrictive pericarditis is the sequelae of chronic fibrosis and thickening of the pericardium as a result of chronic inflammation. E
Q. Polyunsaturated Fatty Acids required for dyslipidemia? These are also liquid at room temperature. There are two main types of dietary PUFA's of significance: a) linol
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd