Textbook Notes (362,882)
Canada (158,081)
Psychology (3,261)
PSYC 2410 (149)
Dan Meegan (42)
Chapter 4

Chapter 4 Review

5 Pages
Unlock Document

University of Guelph
PSYC 2410
Dan Meegan

Psyc1100Chapter 4 NotesNature AND NurtureChromosomes and GenesGenotypespecific genetic makeup of individualPhenotype observable characteristics produced by that genetic endowmentcan be affected by other genes and environmentChromosometightly coiled molecule of DNA partly covered by protein DNA portion carries hereditary blueprint in genesIn humans every cell in body except sex cell has 46 chromosomes sex cell 23estimated that union of sperm and egg can result in 70trillion potential genotypes genes code for production of proteins estimated 70000 different proteins in human control structure ofcells and all chemical reactions that take place in cellseach gene carries code for one specific proteinsome genes dominant particular characteristic that it controls will be displayedsomerecessive characteristics will not be shown unless partner gene also recessivegenes are in pairspolygenic transmission gene pairs combining influences to create single phenotypic traitcomplicates picture that would occur if all characteristics were determined by one pair of genesmagnifiesof possible variations in a traitHuman Genome Project 19902001by International Human Genome Sequencing Consortium31 billion letters in entire human genomeRecombinant DNA procedures researchers use certain enzymes to cut long threadlike molecules of DNAfrom another organism and insert into a host organism eg bacteriumthis procedure used to produce human growth hormoneGene Knockout altering specific gene in a way that prevents it from carrying out its normal functioneffects on behaviour are then observedcan help psychologists determine importance of particular transmitter substances in relation to behaviours of interestbut very few behaviours controlled by a Single gene and a single gene may disrupt a wide range of functions ie one behaviour does not just link with one gene and vice versabehaviour genetics interested in studying how heredity and environmental factors combine to influencepsychological characteristicsheritability coefficient statistical estimation of extent to which variation in particular characteristic can be attributed to genetic factorsHeredity passage of characteristics from parents to offspring by way of genesHeritabilityhow much of the variation in a characteristic within a population can be attributed to genetic differences differencevariation in a trait across individuals not the trait itself Heritability coefficient way to estimate how much of variation is attributable to genetic factorsapplies only to differences within a group not between groups See Table 41 p 138important to know what group is studied can effect findings eg the closer the environment that the group shares the greater the heritability coefficientIf characteristic has greater concordance aka cooccurance in people who are more highly related this points to possible genetic contribution particularly if people have lived in different environments
More Less

Related notes for PSYC 2410

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.