chapter 9.docx - Chapter 9 Vocab 1 Developmental psychology the branch of psychology that studies how people change over the lifespan 2 Zygote the

chapter 9.docx - Chapter 9 Vocab 1 Developmental psychology...

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Chapter 9 Vocab 1. Developmental psychology- the branch of psychology that studies how people change over the lifespan 2. Zygote- the single cell formed at conception from the union of the egg cell and sperm cell 3. Chromosome- a long threadlike structure composed of twisted parallel strands of DNA: found in cell nucleus 4. DNA- the double stranded molecule that encodes genetic instructions: the chemical basis of heredity 5. Gene- a unit of DNA on a chromosome that encodes instructions for making a particular protein molecule: the basic unit of heredity 6. Genotype- the genetic makeup of an individual organism 7. Allele- one of the different forms of a particular gene 8. Sex chromosomes- X or Y chromosomes that determine biological sex: 23 rd pair 9. Phenotype- the observable traits of an organism 10. Epigenetics- the study of the cellular mechanisms that control gene expression and of the ways that gene expression impacts health and behavior 11. Prenatal stage- the stage of development before birth; divided into germinal, embryonic, and fetal periods 12. Germinal period- the first two weeks of prenatal development 13. Embryonic period- the second period of prenatal development; third to eighth week 14. Teratogens- harmful agents or substances that can cause malformations or defects in a fetus 15.
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  • Theory of cognitive development, two weeks, Piagets theory

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