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PSYC 2410 (149)
Dan Meegan (42)
Chapter 4

Chapter 4 - Psych

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University of Guelph
PSYC 2410
Dan Meegan

Chapter FourPsych 1100 Genetic Influencesy Heredity involves the passing on of specific organic factorsGenotype the specific genetic makeup of an individual which may or may not be expressed in the observable phenotypePhenotype the observable characteristics produced by ones genetic endowmentChromosome tightly coiled strands of Deoxyribonucleic Acid DNA and protein that contains the genesy In humans every cell in the body except one type has 46 chromosomes y Exception is sex cells which has only 23y At conception the 23 chromosomes from the egg combine with the 23 from the sperm to form a new cell the zygote containing 46 chromosomes y Nucleus contains the genetic code y Two copies of each gene one form the mother and from your fatherAlleles the two genes one on each chromosome that control the same traity Each individual gene carries the code for a specific protein and when that gene is activated the cell produces the specified protein y In response to different environmental factors a gene may be activated and a protein produced or an already active gene may be turned off and the levels of a specific protein will then decreaseDominant a gene which when present will produce to solve a particular problemRecessive a gene whose characteristic will be masked by a corresponding dominate gene its characteristic will be expressed if the correspondent gene is also recessivey The characteristic will not show up unless the partner gene inherited from the other parent is also recessiveHuman Genome Project2001 y Discovered humans have fewer genes than expectedRecombinant DNA Procedures genesplicing procedures that can be used to produce new life forms such as bacteria that can produce scarce chemical materials such as human growth hormoney Used this procedure to produce the human growth hormone
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