the biological approach

Question 1

4 assumptions of the biological approach

Answer 1

• all behaviour is due to our biology
• genes are the key influence on behaviour
• biological structures such as the brain, neurones and spinal cord can explain our behaviour
• neurochemistry impacts our behaviour

Question 2

behavioural geneticists often study

Answer 2

twins

Question 3

the two types of twins are

Answer 3

monozygotic and dizygotic

Question 4

monozygotic twins share

Answer 4

100% DNA

Question 5

dizygotic twins share

Answer 5

50% DNA

Question 6

concordance rate is

Answer 6

the degree of similarity between two things

Question 7

there is usually a higher concordance rate in

Answer 7

monozygotic twins

Question 8

a higher concordance rate in monozygotic twins supports the biological approach as

Answer 8

MZ twins share more DNA and so them acting similarly proves the influence of genes on behaviour

Question 9

MZ twins may have a higher concordance rate as

Answer 9

they usually share an environment

Question 10

sometimes we study MZ twins who were

Answer 10

separated at birth

Question 11

genotype is someone’s

Answer 11

genetic makeup

Question 12

phenotype is

Answer 12

the way someone’s genetic makeup is expressed in physical and psychological traits

Question 13

the expression of genes is impacted by

Answer 13

the environment

Question 14

evolution is the idea that

Answer 14

we inherit the genes that allowed our ancestors to survive