PPT-Mechanisms of Genetic Variation

1 16 Copyright McGrawHill Global Education Holdings LLC Permission required for reproduction or display Mutations Their Chemical Basis and Effects Stable heritable changes in sequence of bases in DNA. Genetic Drift (and Inbreeding). DEVIATION. . from . Hardy-Weinberg Equilibrium. Indicates that . EVOLUTION. Is happening. 4 Major Evolutionary Mechanisms that alter allele frequencies in populations:. B. razil. W. el. l. . li. t. an. d . low-nu. t. rient . habitat. Stic. k. y. . underg. r. ound leaves. Eat. s . worms!. P. ereir. a. e. t. . al. . 2012. Th. e. . Pl. a. n. t. o. f. th. e. . D. Introduction. A species of mockingbird lives in the Apalachicola National Forest. One year, a few of the mockingbirds were born with very long beaks. Over the next several years, the area experienced particularly cold winters. The weather forced the insects in the area to burrow deeper into the ground. Surveys of the mockingbird population showed that the number of long-beaked mockingbirds had increased. What would account for this increase in the number of long-beaked mockingbirds?. Image from about.com . meiosis_metaphase_1.jpg. . Mutations. (changes in an organism’s DNA) are the . original. . source of . all. genetic variation. Mutations create different versions of genes called . eyes, what . frequency of the population . is hybrid for brown eyes? Homozygous for brown eyes. ?. 2. . How . does sexual . reproduction . produce variation. ?. 3. Why are point/substitution mutations also known as silent mutations?. The Process of Speciation . How Common Is Genetic Variation?. Many genes have at least two forms alleles.. All organisms have genetic variation that is “invisible” because it involves small differences in biochemical processes.. Your Subtitle Goes Here. Introduction. Two objectives:. Major concepts related to human genetic variation.. Relationship between basic biomedical research and the improvement of personal and public health.. You can compare dogs of every breed imaginable! . There is an enormous range of characteristics that are the result of . genetic variation. . . The differences among breeds of dogs are so great that someone might think that many of these breeds are different species. . You can compare dogs of every breed imaginable! . There is an enormous range of characteristics that are the result of . genetic variation. . . The differences among breeds of dogs are so great that someone might think that many of these breeds are different species. . Unit:09. Lesson: 01. Be prepared to share your response to the following:. Biological evolution happens at the __________ level, not the individual organism level.. All three definitions mention genetic changes or changes in allele frequency within a population from one generation to the next.. ANGGOTA KELOMPOK. SRI YUNIARTININGSIH (P2BA10009). YAYUK SUGIYARTI (P2BA10025). IHDA SYFAI (P2BA10010). Origins of Genetic Variation Among Offspring. The behavior of chromosomes during meiosis and fertilization is responsible for most of the variation that arises in each generation. Jode Edwards, USDA ARS. Dustin Mclean, University of . Guleph. Yunfei. Jiang, University of Guelph. Elizabeth, Lee, University of Guelph. Mark Mikel, University of Illinois. Martin Bohn, University of Illinois. BMI/CS 776 . www.biostat.wisc.edu/bmi776/. Spring 2022. Daifeng. Wang. daifeng.wang@wisc.edu. These slides, excluding third-party material, are licensed under . CC BY-NC 4.0. . by Mark Craven, Colin Dewey, Anthony . BMI/CS 776 . www.biostat.wisc.edu/bmi776/. Spring . 2018. Anthony Gitter. gitter@biostat.wisc.edu. These slides, excluding third-party material, are licensed under . CC BY-NC 4.0. . by Mark Craven, Colin Dewey, and Anthony Gitter.