Briefly explain the steps involved in conducting twin studies. ...

[torybrooks]

Briefly explain the steps involved in conducting twin studies.
 
  What will be an ideal response?

Question 2

The idea that people are different in important ways goes back to at least
 
  a. 400 BC.
  b. 200 AD.
  c. 1800 AD.
  d. 1880 AD.

[reversalruiz]

Answer to Question 1

(1) Pairs of identical twins are compared with each other on a particular characteristic, as are pairs of (same-sex) fraternal twins; (2) these two correlations are compared with each other. If identical twins are more similar to each other than fraternal twins, it must be due to the differences in genetic similarity. (This conclusion could not be drawn if parents treated fraternal twins differently from identical twins.)

Answer to Question 2

A