6. Why are genetic twins who have been separated at birth almost perfect genetic subjects to study?
Since twins who are separated at birth grow up in different environments, scientists can isolate which behaviors are caused by genes and which behaviors are caused by the environment in which people are raised.
7. How is the present-day gene sequencing a type of “scientific gold rush?”
There is much gene information to analyze, and scientists are rushing to discover the many gene sequences that have a medical use and therefore the potential for generating large financial returns.
8. How will gene therapy someday offer people an increase in life span?
Some fatal diseases are caused by mutations in our genes. If disease-causing genes are isolated and treated, life spans may be extended.