S-gene, Biology

Assignment Help:

S-Gene

The S-gene has been suggested to be a super gene complex with several linked genes. It is supposed to have at least six (may he more) closely-linked genes which determine length of style (gene G), surface of stigma (S), pollen incompatibility (I'), stylar incompatibility (I"), pollen size, and/or shape (P), and stamen height (A). Being closely linked they are inherited together but because of crossing over, can be separated. In addition heteromorphic incompatibility can be further characterized by-

  • Saprophytically -determined incompatibility reaction,
  • Inhibited growth of incompatible pollen tube in the style, and
  • Expression of dominance between alleles of the incompatibility genes in both, pollen and style.

Related Discussions:- S-gene

What is tertiary structure of a protein, Q. What is tertiary structure of a...

Q. What is tertiary structure of a protein? What are the major types of tertiary structure? The tertiary protein structure is a spatial conformation additional to the secondary

Explain the alterations occurring in fish, Alterations occurring in fish ...

Alterations occurring in fish The skeletal muscle of fish consists of short fibers arranged between sheets of connective tissue. The connective tissue in the fish muscle is les

Discuss briefly the color reactions of proteins, Question 1 List variou...

Question 1 List various methods used for determination of blood glucose. Explain the principle of each test. Add a note on advantages and disadvantages of each method Qu

Describe st segment depression, Q. Describe ST Segment Depression? The ...

Q. Describe ST Segment Depression? The development of ST-segment depression with exercise is probably the most reliable sign if myocardial ischaemia and appears to be the most

Does ph affect the enzyme activity, Q. Does pH affect the enzyme activity? ...

Q. Does pH affect the enzyme activity? The concentrations of hydrogen ions in solution affect the enzyme activity. Each enzyme has utmost efficiency under an optimum p H . S

What are some evolutionary advantages of animals, What are some evolutionar...

What are some evolutionary advantages of animals with complete digestive tube? The complete digestive tube permits animals to continuously feed themselves without waiting for r

What are the main functions of the bacterial flora, What are the main funct...

What are the main functions of the bacterial flora within the human gut? Bacteria that live inside the gut have great significance in digestion. Some polysaccharides like cellu

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