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Biology exam 1 Study giude

by: Tasha Nelson

Biology exam 1 Study giude Bio 1130

Marketplace > East Tennessee State University > Biology > Bio 1130 > Biology exam 1 Study giude
Tasha Nelson

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About this Document

This is my own version of a study guide for exam one. It covers all concepts except for population equations which will be provided during the exam.
Biology for Science Majors 3
Jennifer Price
Study Guide
Biology, Studyguide, evolution, populations
50 ?




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This 2 page Study Guide was uploaded by Tasha Nelson on Wednesday September 7, 2016. The Study Guide belongs to Bio 1130 at East Tennessee State University taught by Jennifer Price in Fall 2016. Since its upload, it has received 80 views. For similar materials see Biology for Science Majors 3 in Biology at East Tennessee State University.

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Date Created: 09/07/16
Exam 1 study guide What is evolution? ­­­ Genetic change in a population of organisms!  Population­ A group of organisms of the same species living in the same place.  Biological concept­  Interbreeding in a population They have to produce fertile offspring GENE FLOW!  Reproductively isolated Not based on similarity of offspring  Darwin Vs. Lamarck  Darwin: Lamarck: 1800s  Evolution  by natural selection inheritance of acquired characteristics Variation is not created by experience Changes that individuals acquired during But a result of preexisting genetic their lives were passed on to their offspring Differences among individuals.  Mircroevolution­ changes in the population of alleles in population over time.  Alleles­ alternate forms of the same gene.  Monomorphic: one type of allele Polymorphic: more than one type of allele.  Deleterious mutation: detrimental mutation Rate of evolutionary change in a population is proportional to the amount of  genetic  diversity available.  Increased Genetic diversity = increased fitness  populations evolve­­­ individuals DO NOT Heterosis: enhancement of fitness due to increased heterozygosity.  Over dominance: cases of heterozygosity genotype is most fit.  Dominance: dominant allele masks the bad allele.    Genetic disorders are carried along by heterozygotes and only appears when 2  heterozygotes produce offspring.  5 Conditions for Hardy Weinburg Equilibrium  1. Random mating (with respect to the gene in question) 2. Infinite population size (or very large) 3. No migration!!! (between populations) 4. No mutations 5. No selection (no selective or fitness advantage)  Natural Selection: Overproduction of offspring ( some of them will die )  Variation in Fitness that is heritable  Scientific method condensed ­ hypothesis ­ test ­ analyze ­ reproduce Genes:  Homozygous= AA, aa Heterozygous= Aa ­ New alleles are introduced into the population by mutations ­ New combinations of alleles are introduced by CROSSING OVER  PROPORTIONS Proportions should always ADD UP TO 1 !! (check your work) Adaptation:  (noun) a trait that enhances the survival or reproductive ability of those possessing it.  (verb) – process by which beneficial traits are acquired by a population.  Assess whether or not a population is in Hard weinburg equilibrium. 


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