What is the study of heredity and the variation of inherited characteristics?

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Genetics is the study of heredity and the variation of inherited characteristics. It examines how traits are passed from parents to offspring through genes, how different versions of a gene (alleles) influence traits, and how genetic and environmental factors combine to create the diversity we see. Understanding DNA, genes, and chromosomes helps explain why organisms with similar genes can look different, and why variations arise across generations. It also covers how mutations introduce new variation and how inheritance patterns—like dominant and recessive traits—shape what versions of traits appear in offspring. By contrast, ecology focuses on organisms’ interactions with their environment, entomology on insects, and archaeology on human history through artifacts. The field described here is genetics.