Behavioural Genetics

Question 1

What is genotype and phenotype?

Answer 1

Genotype: inheritance and genetic coding = height, intelligence
Phenotype: Physical expression of genes; environment = psychiatric disorder (genotype interacts w/ environ. for phenotype expression

Question 2

what is polygenetic inheritance

Answer 2

no one gene for attribute X

* genes and alleles interact together

Question 3

Adoption Studies

Answer 3

EX: extroversion and IQ

*testing to see if similar to adoptive family (environment) vs biological (genes)

Question 4

Family Study

Answer 4

• compare relatedness w/ how similar they are (concordance)
  EX: Schizophrenia- as relatedness increases, so does risk
  EX: Twin Psychiatric - MZ twins have higher CR% but not 100% meaning environ. plays a part

Question 5

Twin Study Caveat

Answer 5

MZT vs MZA

• n.s in height, weight, iq, personality
• we elicit EN around us and based on our genes - have to be in situation that allows genes to do so