PSYC1001 Lecture Notes - Lecture 4: Caffeine, Twin Study, Microcephaly
9 Aug 2018
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Document Summary
If your 2 alleles for a specific gene are the same form homozygous. If your 2 alleles for a specific gene are different forms - heterozygous. Types of twins: monozygotic, dizygotic, fraternal identical. Intelligence: genes are not static environmental factors turn them on i. e gene expression, certain genes are expressed at certain times in response to certain environmental influences, phenotype (variability) environment , gene triangle. Nature and nurture take home message: many psychological traits are heritable (e. g. iq. Personality, schizophrenia: part of the variability between individuals is related to genetics, but in all cases environmental factors interact with genes to determine phenotypes. Prenatal development: development that occurs between conception and birth, begins in fallopian tube when sperm penetrates egg and forms a zygote, takes about 266 days for the one-celled zygote to become a fetus of 200 billion cells. Limit of viability is currently 24 weeks gestation i. e when born at 24 weeks, there is a 50/50 chance of survival.
