Raven (raven_wagner) wrote in x_2012, @ 2010-12-27 23:33:00 |
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Your mother's eyes, your father's height, your predisposition to disease-- these are traits inherited from your parents. Traditionally, 'heritability' is estimated by comparing monozygotic (genetically identical) twins to dizygotic (genetically different) twins. A trait or disease is called heritable if monozygotic twins are more similar to each other than dizygotic twins. In molecular terms, heritability has traditionally been attributed to variations in the DNA sequence.There was no link between likelihood of the twins studied as to whether one developing a mutation as a result of the flare was a genetic predisposition. Location, shielding, it all seemed to play a role as much as genetics did. And then there was the sheer variation in the types of mutations. No simple combination of alleles could account for one mutant like her and then another who could make things float with their mind.