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. 2021 Nov 30;12:719038. doi: 10.3389/fphys.2021.719038

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Copyright © 2021 Mollá-Albaladejo and Sánchez-Alcañiz.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Cumulative and relative contribution of different sources of interindividual variability from early development stages to adult life experience. Individuality emerges from the combination of genetic factors, environmental factors, and stochastic factors. (B) Variance distribution for a given phenotypic trait evoking variability among individuals within a population (Buchanan et al., 2015). (C) Variance distribution of phenotypic handedness is inherited to next generations within a population (Ayroles et al., 2015).