PSY 213 1st Edition Lecture 5 Outline of Last Lecture I Evolutionary Psychology II Genetic Foundations of Development III Genes and Chromosomes IV Genetic Principles V Sex Linked Chromosome Abnormalities Outline of Current Lecture I Gene Linked Abnormalities II Behavior Genetics III Prenatal Development IV The Course of Prenatal Development Current Lecture I Gene Linked Abnormalities Phenylketonuria PKU a Metabolic disorder that left untreated causes mental retardation babies who are born with PKU and it is not caught in time the child will have permanent cognitive impairments Caused by recessive gene 1 in 10 000 20 000 but it is possible for the baby to grow up normal need environmental intervention Sickle cell anemia These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute b Blood disorder that limits the body s oxygen supply causes joint swelling heart and kidney failure It robs the body of oxygen Ethnic differences with this disease Happens to more African Americans than Caucasians Cystic fibrosis Diabetes Hemophilia Huntington disease doesn t appear till later in life Average age of symptoms is 35 terminal Central nervous system starts shutting down Inherited Spina bifida Tay Sachs disease Jewish pop is more likely to be affected Central nervous system starts to shut down around 6 months of age Blind deaf children only live to about three or four II Behavior Genetics Seeks to discover the influence of heredity and environment on individual differences in human traits and development how much of your intelligence it due to mom and dad or environment factors like healthy diet stimuli of the brain etc a Twin study look at identical twins and if one twin has a particular trait then we would expect the other twin would also have the trait That s not always the case It s not all about genetics b Adoption study looks at behavior and psyche characteristics resemble their adoptive parents or their biological parents more III Prenatal Development The course of prenatal development Prenatal tests Infertility and reproductive technology Hazards to prenatal development Prenatal care IV The Course of Prenatal Development Germinal period Takes place in the first two weeks after conception Includes Creation of fertilized egg the zygote Cell division things happen very quickly Attachment of the multicellular organism to the uterine wall Embryonic period Occurs from two to eight weeks after conception Cell division increases more rapidly Support systems for organs is being laid down Organs begin to appear If women are exposed to bad things during this period it can have a negative effect Fetal period Extends from two months after conception until birth in typical pregnancies Last stage Lasts about seven months Growth and development are dramatic during this stage Layer of fat is added to help protect fetus temp control Fetus becomes more active Age of viability is 24 25 weeks about 5 months may survive The smaller they are the greater the chances they will not survive Learning already takes place in the womb
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