Here is a link to a Wikipedia entry on the genetics of left-handedness:

http://en.wikipedia.org/wiki/Handedness#Genetic_factors

dear adam, dont u think that epigenetics have more to do with handedness than genetics? isnt the addition of chemical groups on chromatin that changes its structure? dont dna sequences during evolution prevail because of enviromental pressure inside the nucleus? what is more important for material life? the sequence or the sequence structure?

Here is a review article that addresses the subject of epigenetics and handedness. Personally, I have no opinion on the subject of whether genetics or epigenetics has a greater influence on handedness. They probably both have an influence, along with cultural pressures and maybe random choice by children as well.

does anybody see  connections between handedness and biomolecule orientation or L  and D amino acids?

Amino acids in proteins are all L isomers in nature, except glycine, which is not chiral. (Bacteria incorporate some D-amino acids in non-ribosomally synthesized peptides.) I can't imagine what connection there could possibly be between that fact and whether someone is right or left handed.

nothing in nature is 100%, so i am sure that not all isomers have the L conformation.polymerization is basic for life so it must have a conceptual dimension, but amino acids is an example, the question is if someone sees connections between biomolecule orientation and handedness as a conceptual orientation

I don't understand what you mean by a "conceptual dimension." As for the stereochemistry of amino acids, there is no argument. Ribosomally synthesized proteins are made exclusively of L-amino acids (except for glycine). Racemization to the D stereoisomer occurs sometimes through a random process, and this can be used to measure the age since death of biological specimens (http://en.wikipedia.org/wiki/Amino_acid_dating).

conceptual dimension as for  polymerization of the information. if you look for the behaviour of parental chromosomes during early embryonic stages then u see similarities with male behaviour

i almost enjoyed reading klar despite his statistics

One should not confuse an analogy or mere resemblance with a scientific principle. Philosophy is one thing, science another.

Real biological processes are far more complex and fine-grained than anyone would ever have imagined before the ability was developed to examine them at the molecular level. A good example of this , I think, was the unsuccessful attempt by theorists, notably those with a background in theoretical physics, to understand the genetic code (how DNA codes for amino acid sequences). Ultimately, it required extensive experimental investigations to understand the process.

dear adam paternal chromosomes r responsible for the creation of umbiliqual chord,amniotic sac,chorium,placenta. paternal chromosomes exclusively r responsible for creating a steady enviroment for the new life leaving the care of stem cells to maternal chromosomes. This is not philosophy but basics of developmental biology. DONT U SEE similarities with male behaviour? 

Yes, these tissues are derived from the mother. To what aspect of male behavior do you see a similarity? Providing for the children? Mothers do that, too. In many species of animals, the father takes no role in raising the offspring, and unfortunately this is sometimes true for humans, as well. Or is that the male behavior you meant? Either way, it is merely an analogy: Man is to child-rearing as sex chromosomes are to embryonic development.

Rather than analogies, I think you would be better off looking to sociobiology for clues to the evolutionary basis of animal behavior, or developmental biology and neurobiology for the physical basis. All behavior ultimately originates from the physical structure of the animal, which is determined by the DNA sequence and epigenetic modifications of it, as the result of a very, very complex molecular developmental program but may also involve learning and environmental influences. This includes left-handedness, to bring the discussion back to where it started.

Thanks for the wikipedia links adam