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Unformatted text preview: Chapter 9 Lecture Development The branch of psychology that studies the patterns of growth and change occurring throughout life Prenatal Development: Basics of Genetics Cells Basic unit of body. At conception we are one cell Chromosomes Rod-shaped structures that contain the basic hereditary information Genes Smaller units through which genetic information is transmitted Special Production Units Ovaries produce ovum (egg) Testicles produce sperm Cells of ovum and sperm each have 23 chromosomes not 46 Chromosome #23 in each is sex chromosome In ovum - #23 is X chromosome In sperm - #23 are both X and Y chromosomes The Earliest Development Germinal period First 2 weeks zygote Embryonic period 2 to 8 weeks embryo Embryo has beginnings of a heart and brain Two tiny gonads Two tiny duct systems Fetal Period 8 weeks until birth Age of viability Point at which it can survive if born prematurely (about 24 weeks)...
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This note was uploaded on 04/29/2008 for the course PSYC 1000 taught by Professor Handron during the Spring '08 term at East Carolina University .
- Spring '08