Synonyms
Definition
Individuals share approximately the same amount of genes with their biological children and with their full siblings.
Introduction
Biological parents share an average of 50% of the same genes with their children and stepparents share 0% of the same genes with their stepchildren. Adoptive parents can either share some genes with their adoptive children (in the case of within-family adoption) or not. In addition, individuals share approximately 50% of their genes with their full siblings, 25% of their genes with their half siblings, and 0% of their genes with their step-siblings. In the case of within-family adoption, siblings can be genetically related, but in the case of outside family adoption, they tend to be unrelated.
Although individuals share approximately the same proportion of genes with both their biological children and their full siblings, these relationships are substantially different from each other. Sibling...
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References
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Tanskanen, A.O., Danielsbacka, M. (2017). Children and Sibs Share Same Proportion of Genes. In: Shackelford, T., Weekes-Shackelford, V. (eds) Encyclopedia of Evolutionary Psychological Science. Springer, Cham. https://doi.org/10.1007/978-3-319-16999-6_1173-1
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DOI: https://doi.org/10.1007/978-3-319-16999-6_1173-1
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