when someones behvaiour is influenced through genes so it is hereditary
when someones behaviour is determined by the enivorenment
where over 100 risk alleles were related to schizophrenia
there may be many alleles associated with behvaiour
we do not know what extent environement affect genes (gene-environement correlation)
argues that nature and nurture work together to determine our behaviour
the genetic vulnerability of having certain genes which predispose us to an illness or behaviour
w- research found that nature and nurture cannot be seperated. Plomin et al suggests that if a child has genes that make them aggressive they will make friends who are aggressive .
w-maguries study as he found that taxi drivers brain the hippocampi grew because of the environment.