Gene interactions (post mendelian genetics), Biology

GENE INTERACTIONS (POST MENDELIAN GENETICS)

Phenotypic expression of a gene may be altered by the influence of other genes. The modification of the normal phenotype of certain genes by other genes is known as gene interaction.

The gene interaction is of 2 types : intragenic or interallelic and intergenic or nonallelic.

1. Intragenic Interactions

These interactions occur between the two alleles of same gene to produce a phenotype different from the normal dominant - recessive phenotype. The common intragenic interactions are incomplete dominance, codominance, multiple alleles.

2. Intergenic Interactions

These interactions occur between the alleles of different genes present on the same or different chromosomes to alter the normal phenotype. The familiar intergenic interactions include complementary genes, supplementary genes, polygenes, epistasis, pleiotropy, lethal genes etc.

Posted Date: 10/10/2012 4:11:53 AM | Location : United States







Related Discussions:- Gene interactions (post mendelian genetics), Assignment Help, Ask Question on Gene interactions (post mendelian genetics), Get Answer, Expert's Help, Gene interactions (post mendelian genetics) Discussions

Write discussion on Gene interactions (post mendelian genetics)
Your posts are moderated
Related Questions
Although there are differences in interpretation of the evidence, it is generally accepted that human biological evolution has not been a linear progression from one species to the

What is diarrhoea? Diarrhoea is characterized by the frequent evacuation of liquid stools, usually exceeding 300 ml, accompanied by an excessive loss of fluids and electrolyte

What is the law of limiting factors? How would the rate of photosynthesis be affected if the soil water becomes limiting? Describe.

middle man of the body

What is Slime Molds in diversity of life? Acrasiomycota and Myxomycota are appropriately named slime molds. They are slimy! The other part of their name comes from the time whe

Marek's disease Marek's disease is a lymphoproliferative disease of chicken, quails, bantams and other free-flying birds. It is caused by the Gallid Herpesvirus 2 of subfamily

Limitations of Ecological Pyramids The pyramid of energy is a significant improvement over the previous two types of ecological pyramids, yet all of them overlook one or anot

Primary Prevention: Primary prevention should have the following goals:  i)  Ascertaining at the risk population and  the high risk situations where stressful life events a

Cell membrane lining the inner surface of the cell wall The cell membrane lining the inner surface of the cell wall is made up of phospholipids (45%) and proteins (55%). Some

Y-Linked traits in humans Any gene that occurs exclusively on the Y chromosome is said to be holandric and it is not expressed in females. Such a Y-linked gene normally occurs