Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
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.
Q. Show the Use of Incineration for sterilization? This is an excellent method for rapidly destroying materials such as soiled dressings, animal carcasses, bedding and patholog
List a few important uses of food hydrocolloids. A few important uses of food hydrocolloids are: to increase viscosity and to stabilize food products. Its other uses include u
How does biogeography contribute to an understanding of evolution? In biogeography studies, same animals that seem to be closely related are adapted to dissimilar environments
Q. What do you mean by Pericardium? Pericardium is the sac covering the heart. Pericardium consists of two layers-the visceral pericardium (epicardium) and the parietal pericar
Explain Adverse effects of Zidovudine It include anemia, neutropenia, nausea, vomiting, headache, fatigue, confusion, malaise, myopathy, hepatitis, and hyperpigmentation of or
During mitotic anaphase is there separation of homologous chromosomes or separation of identical chromatids? In the anaphase of mitosis the identical chromatids separate and co
Mas s Extinction - Since beginning many species evolved and got extinct (in fact only 1 % is living). Sometimes it occured suddenly at large scale, (most recently dinosa
Q. Show Complications of Mitral Stenosis ? Hemoptysis It is a common complication in patients with mitral stenosis and is related to the severity of mitral stenosis. Pulm
Spermatophores Many non-chordates do not release free sperms during copulation. They have a mechanism to bundle and enclose a number of sperms in a sheath usually made of gela
Explain the Toxicity of nicotinic acid? Although therapeutically useful in lowering serum cholesterol, administration of chronic high oral doses of nicotinic acid can lead to h
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd