Biology of handedness

Is handedness determined by genetics? - MedlinePlus

It was initially thought that a single gene controlled handedness. However, more recent studies suggest that multiple genes, perhaps up to 40, ...

Handedness - Wikipedia

Handedness is an individual's preferential use of one hand, known as the dominant hand, due to it being stronger, faster or more dextrous.

Handedness and its genetic influences are associated with ... - PNAS

Genetic influences on handedness were associated with some of these brain asymmetries, especially of language-related regions. This suggests links between ...

The genetic relationship between handedness and ...

Genes controlling left/right (LR) body asymmetry also influence handedness. Some genes associated with handedness or dyslexia are expressed in cilia.

Hand Dominance: Nature, Nurture, and Relevance for Hand Surgeons

However, genetic probability alone does not account for the asymmetry. Data suggest that the delicate balance in hand laterality may reflect an equilibrium ...

The origins of handedness | Science | AAAS

Our handedness probably arose sometime after the chimp and human lines went their evolutionary ways about 5 million to 7 million years ago.

Genome-wide association study identifies 48 common genetic ...

Our GWAS and SNP heritability analyses conclusively demonstrate that handedness is a polygenic trait, with multiple genetic variants that ...

Genetics of handedness - Institute for Molecular Bioscience

The ratio of the influence of genetic factors to environmental factors varies from trait to trait – in handedness, genetics only has a 25 per cent influence on ...

The evolution and biological correlates of hand preferences ... - eLife

About 90% of humans are right-handed. While it is known that handedness is caused by certain brain regions that are specialized in one of the ...

Head in Hand | American Scientist

The random-recessive model explains the two big conundrums about genetic theories of handedness: Half of the children of a pair of left-handed parents are right ...

A large-scale population study of early life factors influencing left ...

... handedness was very weakly heritable, but shared no genetic basis with birthweight. Although on average left-handers and right-handers ...

How molecular 'handedness' emerged in early biology - ScienceDaily

The emergence of homochirality was due largely to a chemistry phenomenon called kinetic resolution, in which one chiral form becomes more abundant than another.

Handedness | physiology - Britannica

Handedness, a tendency to use one hand rather than the other to perform most activities; it is the usual practice to classify persons as right-handed, ...

The genetics and evolution of handedness.

At some point in hominid evolution, a mutation may have produced a "dextral" (D) allele, strongly biasing handedness in favor of the right hand and control ...

Right Handedness - an overview | ScienceDirect Topics

The presence of an overwhelming majority of right-handers in human populations can lead one to conclude that right-handedness is a near universal genetic design ...

Origin of Life's Handedness and Protein Biochemistry

The molecules of life have a similar handedness. Proteins for example are like your left hand, made up of amino acids that are all left-handed. This phenomenon ...

Left Handedness - an overview | ScienceDirect Topics

First and foremost, it is clear that handedness has a hereditary basis, as it does tend to run in families. That said, handedness does not appear to have the ...

Genes associated with left-handedness linked with shape of the ...

A new study has for the first time identified regions of the genome associated with left-handedness in the general population and linked ...

The Biology of . . . Handedness - Discover Magazine

Research has offered the first definitive proof that apes, like humans, have hand preferences: A third of the Yerkes chimpanzees are lefties and the rest are ...

Biology of handedness - Max Planck Institute for Psycholinguistics

Hand preference reflects a functional difference between the left and right brain hemispheres. Left-handedness is found at an increased rate in some psychiatric ...