Genetics Assignment Example | Topics and Well Written Essays - 250 words - 3

Genetics - Assignment Example Due to environmental factors, they may differ in height, psychological make-up, intelligence, and other physical traits including skin coloration. By virtue of being raised in separate homes that differ in culture, education, wealth, and parenting style, the twins often develop different traits1. It has been evidenced that the role of the environment appears maximal in the early development of life and reduces significantly after compulsory education commences. This is seen, for example, in intelligence as well as reading2 . Joseph shares the view that in the gene and environment interaction, the gene effects are reliant on the environment. For example, a one twin may be 1 inch taller than the other because of living in a home where more nutritious foods are provided3. The skin color is polygenic because various genes pair to form the phenotypic trait, which is skin color. Skin coloration is controlled by 3 to 4 genes. Each gene provides a small, yet additive effect. It is equally important to note that the environment also plays a crucial role in skin coloration. The associated phenotypic traits of skin color are eye color, weight, temperament, and intelligence4. Byrne, Brian; Wadsworth, Sally, Corley, Robin, Samuelsson, Stefan, Quain, Peter, Defries, John, Willcutt, Erik, Olson, and Richard, Kelvins. â€Å"Longitudinal twin study of early literacy development: Preschool and kindergarten.† Journal of Scientific Studies of Reading.