Heredity and the EnvironmentKey Terms: Heredity, Twin Studies

Nature or Nurture? Rousseau

We are born with everything that makes us who we are

Noble savages to be corrupted by society Locke

Babies are blank slates; no knowledge or skills

Experiences determine who we become

Victor: The Feral Child of Aveyron

Found around age 12

Could not walk upright or talk

Thought to be mentally unsound

Jean-Marc Itard thought otherwise

Nature AND Nurture?

Mental Disease If one twin is

schizophrenic, the other is 3x more likely to become so

Not always going to happen

Twin Jims Identical twins

separated at birth Shared many things

in common normally considered “nurture” traits I.E. Drinking habits,

vacationing spots, jobs

Twin Studies Identical twins =

identical DNA Reveals

importance of genes in acquiring certain traits

Twins separated at birth

Videos Twins: Epigenetics Twins: Is is All in the Genes?