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A trait is a characteristic of an organism. These can be determined by the environment, genes, or interactions within the traits. A genotype is the trait being genetically passed on to the offspring.

This law tells us that in a heterozygote, one trait is going to mask the presence of another trait that holds the same characteristic. Only the dominant allele will be expressed instead of both.

Kuper, N., Modersitzki, N., Phan, L. V., & Rauthmann, J. (2020). The Situation During the COVID-19 Pandemic: A Snapshot in Germany. PsyArXiv. https://doi.org/10.31234/osf.io/49chx

Jiang, C., Gao, J., & Magdon-Ismail, M. (2020). Inferring Degrees from Incomplete Networks and Nonlinear Dynamics. ArXiv:2004.10546 [Physics]. http://arxiv.org/abs/2004.10546

Richardson, S., Hirsch, J. S., Narasimhan, M., Crawford, J. M., McGinn, T., Davidson, K. W., Barnaby, D. P., Becker, L. B., Chelico, J. D., Cohen, S. L., Cookingham, J., Coppa, K., Diefenbach, M. A., Dominello, A. J., Duer-Hefele, J., Falzon, L., Gitlin, J., Hajizadeh, N., Harvin, T. G., … Zanos, T. P. (2020). Presenting Characteristics, Comorbidities, and Outcomes Among 5700 Patients Hospitalized With COVID-19 in the New York City Area. JAMA. https://doi.org/10.1001/jama.2020.6775