Chromosomes and hormones

Question 1

What are chromosomes

Answer 1

made from DNA (a gene section of DNA) 23 pairs

Question 2

Gender determining chromosomes

Answer 2

pair 23, egg-X, sperm X or Y.
y contains the sex determining region which causes testes development

Question 3

What are hormones

Answer 3

trigger gender development through the growth of reproductive organs

Question 4

Male hormones

Answer 4

Androgens are produced from 8 weeks
Control the development of male sex organs
Linked to aggression

Question 5

Evidence for androgens being linked to aggression

Answer 5

Van de poll et al- female rats who were given testosterone became more aggressive.

Question 6

Oestrogen

Answer 6

Controls female sexual characteristics and menstruation
linked to emotionality and irritability (PMT)

Question 7

Oxytocin

Answer 7

‘love hormone’
triggers bonding with mother and child after birth and stimulated lactation. reduces cortisol

Question 8

Chromosome support

Answer 8

David Reimer- born a girl, socialised as a girl but nature and biology was stronger.
He was castrated so not an influence from hormones.
The presence of a twin brother may have caused identification

Question 9

Hormone support

Answer 9

Congenital adrenal hyperplastia- high testosterone in dev. (girls developing ambiguous genitalia)
May be due to constrictivism