Researchers found that if the mothers of monozygotic twins were ...

[jenna1]

Researchers found that if the mothers of monozygotic twins were more negative toward one of their twins, that twin
 
  became more antisocial than the co-twin.
  became less antisocial than the co-twin.
  grew more slowly than the co-twin.
  needed more medical care than the co-twin.

Question 2

Alan is an adopted child who lives with three siblings, all biological children of his adoptive parents. Alan's math skills are far better than those of his adoptive parents or his adoptive siblings. This provides evidence that
 
  shared familial influences play a far bigger role than was previously believed.
  genes may have a stronger effect than familial environment on some abilities.
  much less of the environmental effects on personality come from outside the
  family than was previously believed.
  Alan's own initiative to excel is greater than that of his adoptive family

[helenmarkerine]

Answer to Question 1

became more antisocial than the co-twin.
became less antisocial than the co-twin.
grew more slowly than the co-twin.
needed more medical care than the co-twin.

Answer to Question 2

genes may have a stronger effect than familial environment on some abilities.

[jenna1]

YES! Correct, THANKS for helping me on my review

[dyrone]

Thanks for the timely response, appreciate it