No, you're not more likely to be genetically similar to someone who looks the same as you
Genetics is a branch of biology concerned with the study of genes, genetic variation, and heredity in organisms.
Though heredity had been observed for millennia, Gregor Mendel, Moravian scientist and Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically. Mendel studied "trait inheritance", patterns in the way traits are handed down from parents to offspring over time. He observed that organisms (pea plants) inherit traits by way of discrete "units of inheritance". This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene.
In the twenty-first century, the fundamental concepts of genetics—trait inheritance and molecular mechanisms of gene inheritance—remain; however, modern genetics has gone beyond inheritance to include the study of the function and activity of genes. The cell, the organism (such as dominance), and the context of a population are investigated in relation to gene structure and function, variation, and distribution.
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