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Anth. 105 Human Species – Lab 1 ReportIntroductionMost people believe that DNA is the sole thing that determines ones’ physical appearances, mental abilities and everything else about a person. But in reality this is not completely true. Yes, the DNA determines every trait but some times a trait is expressed differently or not expressed at all because of outside factors. The DNA determines your genotype, but not necessarily your phenotype. There are two types of traits; simple and complex. Simple traits are traits such as hair color or eye color. Simple traits are determined by only ones’ genotype. Complex traits are determined by ones’ genotype and their environment in which they grew up in and currently live in. Height, weight and intelligence are all examples of complex traits. They are heavily influenced by a person’s environment. It is known that people that grow up in higher latitudes tend to be taller. Diet and training also play a role and so does the internal environment of a person such as sex hormones.