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MCB 10-1 - Molecular and Cellular Biology 10 What is the...

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March 29 th , 2010 Molecular and Cellular Biology 10 What is the role of genetics in human biology? I. Genetics, genes in particular, endow each individual with certain characteristics. a. Phenotypes i. Physical features, which we can see, that are under genetic control. 1. Such as hair color, eye color, and skin color. a. Red hair is a recent genetic mutation. b. Modifiable i. Environment pays a factor too. b. Genetic Influences i. Genes play a role, but not an exclusive role. 1. Example a. Tall parents have tall kids and short parents have short kids. b. Over the last century in the United States, the average American woman has increased her height by almost 4 inches. i. 5 2 to 5 5 ii. This change cannot be attributed to genetics because genes do not change this fast. The environment must be the contributing factor. iii. Environment includes better prenatal care, etc. c. Genes often influence traits that we see, but environment can alter phenotypes also.
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