PSYD51H3 Lecture 17: PSYCH 101 EVOLUTIONARY PSYCHOLOGY
Document Summary
The nature -nurture debate echoes on in psychology where nativists like sir francis galton suggest that our genetics are all important and environmentalists like john b. watson suggest that our circumstances and experiences are all important. Chromosomes are the basic structural units of heredity which are composed of dna, normal humans have 23 pairs of chromosomes with the last pair being the sex chromosomes ( xx-female; xy-male). At the initial genetic stage of development, conception the individual is either male of female having x y or x x chromosomes #23. At the embryonic stage of development, testosterone may be secreted causes the development of male genitals, and brains. Age 18-36 months children generally first declare their gender and become occupied with making a clear distinction. Puberty where secondary sexual characteristics arise through further hormonal secretion (final) body changes occur and adult gender identity is (fixed).
