(n.) Bodily condition or constitution, esp. a morbid habit which predisposes to a particular disease, or class of diseases.

Altmann theory DNA De Vries theory Galtonian theory Mendelianism Mendelism RNA Verworn theory Weismann theory Weismannism Wiesner theory a thing for affinity allele allelomorph animus aptitude aptness bent bias birth body-build brand cast character characteristic characteristics chromatid chromatin chromosome complexion composition conatus conduciveness constituents constitution crasis delight determinant determiner dharma disposition eagerness eccentricity endowment ethos eugenics factor feeling for fiber frame gene genesiology genetic code genetics genius grain habit hereditability heredity heritability heritage hue humor humors idiosyncrasy ilk inborn capacity inclination individualism inheritability inheritance kidney kind leaning liability liking make makeup matrocliny mental set mettle mind mind-set mold nature patrocliny penchant pharmacogenetics physique predilection predisposition preference prejudice probability proclivity proneness propensity property quality readiness recessive character replication sensitivity to set slant soft spot somatotype sort spirit stamp strain streak stripe suchness susceptibility system temper temperament tendency tenor tone tropism turn turn of mind twist type vein warp way weakness willingness