in the/somebody's blood/genes

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in the blood

Innate, as of a skill or quality. That type of passion can't be taught—it's in the blood.
See also: blood
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

in the blood

 and in one's blood
Fig. built into one's personality or character. John's a great runner. It's in his blood. The whole family is very athletic. It's in the blood.
See also: blood
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

in the/somebody’s ˈblood/ˈgenes

part of somebody’s nature and shared by other members of their family: Both his father and his mother were writers, so literature runs in his blood.
See also: blood
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
No significant associations were found between serum levels of total cholesterol, HDL-c, or LDL-c with the CNVs in the genes or intergenic regions analyzed.
Several studies have reported that mutations in the genes encoding leptin (LEP) and its receptor (LEPR) have been associated with hyperphagia and morbid obesity [27, 28].
The results show that the variants in the genes coding for functional kidney proteins have little clinical relevance in INS while variants in genes involved in glucocorticoid metabolism show marginal association with INS.
oxidative stress) affect behavioral function and change, and b) explore age effects in the genes or QTLs implicated in behavioral functioning (e.g.