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Chapter 3: Problem 4

Check your understanding of the methods scientists use to explore hereditary influences on specific behavioral traits by filling in the blanks in the descriptive statements below. The answers can be found in the back of the book in Appendix A. The findings from family studies, twin studies, and adoption studies suggest that heredity does not influence a trait when ______ is not related to ______.

Short Answer

Expert verified
Answer: A trait is not influenced by heredity when its occurrence is not related to the genetic similarity of the individuals in the study.

Step by step solution

01

Understanding family studies, twin studies, and adoption studies

Family studies involve comparing the occurrence of a specific trait among family members to identify whether a certain trait is more common in families. Twin studies involve comparing the similarities and differences in traits between identical (monozygotic) and fraternal (dizygotic) twins. Adoption studies focus on comparing traits of adopted individuals with their adoptive and biological families. These methods are used to evaluate the influence of heredity on a certain trait.
02

Identifying when heredity does not influence a trait

Heredity is not influencing a trait when the occurrence of the trait is not related to the genetic similarity of the individuals in the study. In other words, if the likelihood of a trait appearing is independent of the genetic relationship between individuals, it suggests that hereditary factors are not contributing to the presence of the trait. Given this understanding, we can complete the statement from the exercise. The findings from family studies, twin studies, and adoption studies suggest that heredity does not influence a trait when trait occurrence is not related to genetic similarity.

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Check your understanding of the methods scientists use to explore hereditary influences on specific behavioral traits by filling in the blanks in the descriptive statements below. The answers can be found in the back of the book in Appendix A. The findings from family studies indicate that heredity may influence a trait if _____ show more trait similarity than _____.

Check your understanding of the methods scientists use to explore hereditary influences on specific behavioral traits by filling in the blanks in the descriptive statements below. The answers can be found in the back of the book in Appendix A. The findings from adoption studies suggest that heredity influences a trait if children adopted at a young age share more trait similarity with their _____ than their _____.
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