DrVanVliet Finds That of a Sample of Pairs of Identical

Multiple Choice

Dr.VanVliet finds that of a sample of pairs of identical twins raised together,80% were either both "owls" or both "larks." Dr.VanVliet then investigates pairs of identical twins raised in very different families,and pairs of fraternal twins raised either together or in very different families.He again records the percentage of pairs of twins raised who were either both "owls" or both "larks." Based on your text's discussion,which of the following best approximates the pattern of results he should find?

A) identical apart - 60%; fraternal together - 40%; fraternal apart - 20%
B) identical apart - 80%; fraternal together - 80%; fraternal apart - 80%
C) identical apart - 75%; fraternal together - 65%; fraternal apart - 60%
D) identical apart - 65%; fraternal together - 75%; fraternal apart - 60%