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A twin study is conducted to examine the role of genetics and environment on the fondness of individuals for chocolate. Which of the following results would lead to the conclusion that genetic factors are important in the development of this trait?
a. Twins who have lived together are more similar on the trait than twins who have lived apart.
b. Twins who have lived apart are more similar on the trait than twins who have lived together.
c. Identical twins are more similar on the trait than fraternal twins.
d. Fraternal twins are more similar on the trait than identical twins

Respuesta :

c. Identical twins are more similar on the trait than fraternal twins.

Explanation:

  • Twins are siblings from same pregnancy.
  • Identical twins are monozygotic i.e they develop from the same zygote.
  • Fraternal twins are dizygotic  i.e. they develop from two different zygote formed by fusion of of two different eggs with two different sperms.
  • Thus,identical twins genetically identical to each other but fraternal twins are not.
  • So if identical twins are more similar in a given trait than fraternal twins then it can be concluded that the trait is dependent on Genetic factor.

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