PPT-Allelic Frequencies and Population Genetics

85 Starter What is the term for all the alleles of all the genes in a population Gene Pool What do you think the term would be for the number of times an allele occurs within a gene pool Allelic Frequency. 8.5. Starter. What is the term for all the alleles of all the genes in a population?. Gene Pool. What do you think the term would be for the number of times an allele occurs within a gene pool?. Allelic Frequency. In-build . mechanisms for adaptation. (or evolutionary mechanisms). Biology Stage 3. Text: Chapter 23. Human Biology Stage 3 . Text: Chapter 15. Key ideas. Population genetics. Observable facts. Natural selection. What you need to know. Ahmed . Rebai. Ahmed.rebai@cbs.rnrt.tn. DNA.. The code of life. DNA . is. a . molecule. made of four bricks . Living . cells. /. organisms. have DNA . within. . it. DNA . contains. Population Genetics. Definition: study of evolution from a genetic point of view.. Microevolution: Change in the collective genetic material of a population. . Within a population, individuals may vary in observable traits. Scientists use a . Pre-Class Exercise . Learning Objectives. By the end of this session, students should be able to…. Illustrate how historical human migration patterns have contributed to genetic variation observed in modern populations.. is concerned with the question of whether a particular allele or genotype will become more common or less common over time in a population, and Why.. Example: . Given that the CCR5-. D. 32 allele confers immunity to HIV, will it become more frequent in the human population over time?. Population genetics. : focuses on genetic changes within an interbreeding population.. Gene pool = _______________________________. Allele Frequency . =. all the genes in a population . Shows frequency of . What is Population Genetics?. Describes allele and genotype frequencies in populations over space and time. Models evolutionary forces (survival, mutation, migration, etc.). Models are generally limited to one or a few loci. Using mathematical approaches to calculate changes in allele frequencies…this is evidence of evolution.. Hardy-Weinberg equilibrium. Hypothetical, non-evolving population. preserves allele . frequencies. Odd populations Deer at Seneca Army DepotCheetah Zosteropslateralis (example of sampling error)Clegg et al Founder EffectWhat happens when a small number of individuals start a new populations?Can res individuals in that population that possess a certain allele is called the allele frequency. Populations can have allele frequencies, but individuals cannot. This makes populations a reasonable hier A definitive diagnosis can usually be made in all genetic conditions. 1. DNA technology:. Synthesis of DNA probes with specific sequences: Bind & identify complementary DNA. DNA sequencing: Identify mutations. Institute of Zoology, . Chinese Academy of Sciences, Beijing, China. Oct 2018. University of Science and Technology of China. 2017.6-2018.6. 2013.9-2018.6. A short self-introduction. USTC, School of Life Science, BS. 4. Population and Evolutionary Genetics. lachance.joseph@gmail.com. https://. popgen.gatech.edu. /. COMT. (. catechol-O-methyltransferase. ) and test-taking anxiety. What is wrong with this claim?. Case Study #1.