What are complementary genes, Biology

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

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
Related Questions
Describe Pharmacologic Agents in amyl nitrite ? Amyl Nitrite : It produces vasodilatation which initially results in marked fall in BP and in the next 30-60 seconds there is

Adverse effects of Enfuvirtide Almost all patients make local injection site reactions to enfuvirtide, usually having of mild or moderate pain, erythema, induration, nodules an

Explain the Management of Furcal Perforation 1 st isolate the perforation site. If the perforation is mechanical accidentally occurred:   a- It is probably

Systems Theory - Accident Causation The systems theory established extremely strong relationship between system and accident. A properly functioning system may avoid accidents

Q. What is the function of the myelin sheath? Do all axons present a myelin sheath? The function of the myelin sheath is to improve the speed and safety of the neural impulse t

Lentic Ecosystems Lakes are inland, depressions containing standing water. They vary considerably in area and depth. The largest lake in the world, the lake Superior in North

Explain Vitamins requirement during thyphoid Vitamins : Vitamins which need to be emphasized include B complex, considering the increase  in  the energy requirement and a decr

What is biological control? Biological control is a natural process to control the size of animal, microorganism or plant populations. Biological control is based on the knowle

How are the main classes of arthropods classified according to the presence of larval stage in their embryonic development? In crustaceans there are species with direct and oth

What do carbon chains have in common with a skeletal system?