Homomorphic types - intra specific incompatibility, Biology

Assignment Help:

Homomorphic Types - Intra specific Incompatibility

It is characterized by morphologically indistinguishable mating types within a species. A proper breeding is required for their recognition. This kind of incompatibility operates in more than 250 genera belonging to 71 families of angiosperms. It operates through multiple alleles (as many as 45 alleles are already reported from 500 plants) of S-gene. Pollen grains with one S-allele common with one or both S-allele/s of pistil is incompatible, it is therefore conceivable that on pollen side the haploid gametophyte controls incompatibility. The S-allele my express a relationship of dominance or independence in pollen and/or pistil.


Related Discussions:- Homomorphic types - intra specific incompatibility

Phylum, general charactristics of phylum protozoa

general charactristics of phylum protozoa

Explain amylose, Amylose Amylose molecules have molecular weights rangi...

Amylose Amylose molecules have molecular weights ranging from 10 4 -20 6 . Amylose can form an extended shape (hydrodynamic radius 7-22 nm) but generally tends to wind up into

What are the elements that form the middle ear, Q. What are the elements th...

Q. What are the elements that form the middle ear? What are the names of the three middle ear ossicles that participate in the phonosensitivity? The middle ear is formed by the

Show the chemical indicators used in sterilization cycle, Q. Show the Chemi...

Q. Show the Chemical indicators used in sterilization cycle? Chemical indicators indicate the presence of certain conditions during the sterilization cycle, such as the presenc

Handling microorganisms, Handling : You can reduce direct contact with mic...

Handling : You can reduce direct contact with microorganisms by careful handling and by wearing protective clothing such as rubber gloves, mask, lab coat, etc. Even if you entirel

Define age as a determinants of nutrient requirements, Define Age as a dete...

Define Age as a determinants of nutrient requirements? Age: Requirements change with increasing age between birth and maturity. Nutrient requirements per unit body weight are h

What are the synthetic auxins and what are their uses, What are the synthet...

What are the synthetic auxins and what are their uses? The Synthetic auxins like naphthalenic acid (NAA) and indolebutyric acid (IBA) are substances similar to IAA (a natural a

Control of radio-pollution , (i)        Area uses or perm...

(i)        Area uses or permit exposure to radiation should be Marked' Restricted Area 'or Radiation zone etc. (ii)        Avoid x-rays of chest and lower back in routine physic

Respiratory distress syndrome, Respiratory Distress Syndrome: Respirat...

Respiratory Distress Syndrome: Respiratory distress in a  newborn is  a challenging problem.  It  accounts for significant morbidity and mortality. It occurs  in  4 to 6 per c

Climax forest - xerarch, Climax Forest - Xerarch First, some xerophyti...

Climax Forest - Xerarch First, some xerophytic species of trees, establish in this area. They are sparsely distributed and are stunted because the conditions are still not ver

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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