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This 2 page One Day of Notes was uploaded by Nic Notetaker on Saturday January 24, 2015. The One Day of Notes belongs to PSY-P 102 at Indiana University taught by Jim Cuellar in Spring2015. Since its upload, it has received 119 views.
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Date Created: 01/24/15
PSYCHOLOGY NOTES GENETICS Zygote Single cell formed at conception from egg and sperm Chromosome Thread like structure composed of twisted strands of DNA 0 DNA Double stranded molecule that encodes genetic instructions 0 Gene Unit of DNA that encodes instructions to make particular protein molecule Genotype Genetic makeup of an individual organisms Allele One of the different forms of a particular gene 0 Sex chromosomes XY chromosomes that determine sex 23rCI pair Phenotype Observable traits of organism determined by the interaction of genetics and environment 0 Unique genotype set of 23 chromosome pairs represent unique genotype everyone has basic set of genes but different alleles make people unique GENOTYPE TO PHENOTYPE Characteristics observed in an organism Environmental factors in uence phenotype 0 Different genotypes react differently to environmental factors 0 Most genes are dormant so dependent on environment NEW SCIENCE OF EPIGENETICS Cells develop differently because different genes are activated at different times 0 To activate a gene 0 By activity of other genes 0 Internal chemical changes 0 External environmental factors 0 Epigenetic 0 Study of mechanisms that control gene expression and its effect on behavior and health 0 Insight on how the environment affects gene expression and phenotype 0 Genes can mutate from each generation 0 DNA can be damaged by environmental factors like UV light or chemical toxins PRENATAL DEVELOPMENT Prenatal stage 0 Stage of development before birth germinal embryonic and fetal Germinal period 0 First 2 weeks of prenatal development Embryonic period 0 3r l8th week of prenatal development Fetal period 0 9thbirth of prenatal development 8 PHASES OF EMBRYONIC AND FETAL BRAIN DEVELOPMENT 1 Proliferation o Occurs in ventricular zone 0 Rapid reproduction of cells 0 After mitosis daughter cells become stem cells then morph into different types 2 Migration 0 Radial Glia Act as guide wires for migration of neurons Transportation system for neurons Differentiation is going on as neurons migrate 0 Growth Cones Extensions nd adhesive surfaces and pull the growth cone and therefore grow axon Cones crawl forward and create extensions through links 3 Differentiation o Neurons become xed post mitotic and specialized 0 Develop processes 0 Develop NT making ability 4 Aggregation o Likeneurons move together and form layers 5 Synaptogenesis o Axons form a synapse with other neurons or tissue DEVELOPMENT DURING INFANCY AND CHILDHOOD NEWBORN REFLEXES Rooting Touch side of their cheek and turn in direction and open the mouth Sucking Sucking rhythmically Babinski Curling toes when feet are touched Grasping Gripping ngers really tightly