What are complementary genes? Does this inheritance pattern obey Mendel's second law?

Complementary genes are the different genes that act together to determine a given phenotypical trait.

For instance, consider a phenotypical trait conditioned by 2 complementary genes whose alleles are respectively X, x, Y and y. performing the hybridization in F2 4 the different phenotypical forms are obtained: X_Y_ (double dominant), X_yy (dominant for the first pair, recessive for the second), xxY_ (recessive for the first pair, dominant for the second) and xxyy (double recessive). This is what happens, for instance, regarding the color of budgerigar feathers, in which the double dominant interaction results in green feathers, the dominant for the first pair, recessive for the second interaction results in yellow feathers, the recessive for the first pair, dominant for the second interaction leads to blue feathers and the double recessive interaction leads to white feathers.

Every complementary gene segregates independently from the others since they are located in different chromosomes. Thus the pattern follows the Mendel's second law (although it does not obey Mendel's first law).

 

Posted Date: 6/7/2013 1:52:47 AM | Location : United States

Ask an Expert

Related Discussions:- What are complementary genes, Assignment Help, Ask Question on What are complementary genes, Get Answer, Expert's Help, What are complementary genes Discussions

Write discussion on What are complementary genes
Your posts are moderated

Write your message here..

Related Questions

Explain carrageenan, Carrageenan Carrageenan is a collective term for p... Carrageenan Carrageenan is a collective term for polysaccharides prepared by alkaline extraction (and modification) from red seaweed (Rhodophycae). Carrageenan is a sulfated ga

Explain the use of benzoates acid, Q. Explain the use of Benzoates acid? ... Q. Explain the use of Benzoates acid? Benzoic acid, sodium benzoate and the parahydroxy esters (parabens) are used as preservatives. Benzoic acid and its sodium salt, sodium be

Heterotrophic nutrition, heterotrophic nutrition in any 5 type... heterotrophic nutrition in any 5 types of organism

Determine about the sense of contrast, Determine about the Sense of  Contr... Determine about the Sense of  Contrast It is  the ability to  perceive  slight changes  in  luminance between  regions which  are not  separated by  definite borders. This  is

Synthesis and storage of hormone, Synthesis and Storage of Hormone The... Synthesis and Storage of Hormone The synthesis and storage of hormone depends on the nature of the hormone. Steroid hormones are secreted in diffuse molecular form and usually

Name stems of plants which are leaf like, Which of the below are stems of p... Which of the below are stems of plants that are leaf like in form, are green and perform functions of leaves. Additionally, they may bear fruit, flowers and temporary leaves?

What is the evolutionary origin of the internal membranous, What is the evo... What is the evolutionary origin of the internal membranous organelles of the cell? It is accepted that the internal membranous organelles of the eukaryotic, like the Golgi app

Describe about coronary reactive hyperemia, Q. Describe about coronary reac... Q. Describe about coronary reactive hyperemia? Myocardium depends almost completely on aerobic metabolism. Occlusion of a coronary artery even briefly produces an increase in c

What is iodoacetate inhibitor, What is Iodoacetate inhibitor Iodoacetat... What is Iodoacetate inhibitor Iodoacetate is the inhibitor of glyceraldehyde-3-phosphate  dehydrogenase.

What is the functionality of lungs in human biology, What is the functional... What is the functionality of Lungs in human biology? The right lung consists of three lobes, and the left lung, two lobes. Both lungs hold between 5 to 6 L of gas, called the t