PPT-2.5.1 Variation of Species

252 Heredity and Gene Expression 253 Genetic Code 254 DNA Structure Replication and Profiling FollowMe iQuiz Q What term is used to describe differences within a population with respect to features such as height. Comparative Genomics. 18. th. -21. st. of February 2013. Lecture . 1. Genetic variation. At what level do we study and compare genetic variation?. Populations. Individuals. Kingdom. Phylum. Class. Order. Core Biology. Topic . 1. Unit B1: Influences on life. Topic 1 Classification, variation and inheritance. Classification. Key words: characteristics, unicellular, . multicellular. , nucleus, autotrophic, photosynthesis, heterotrophic, saprophytic, virus . variation . among individuals. .. There are variations in skin . color. , hair . color. , . hair curliness, eye . color. , blood type, . height, . etc.. Human Variation. Inherited Variation. Inherited Variation. Red-browed finch. House finch. How do these two species of Finch vary?. Why do they vary?. DON’T TOUCH ANYTHING ON THE TABLES. All you need is a pen or pencil. WALT understand how adaptation can lead to evolution.. What do you mean by variation..?. Differences between species. Differences within a species. SPECIES : . A . species.  is a group of organisms that are able to interbreed and produce . fertile.  offspring.. What is variation?. Define Variation…. What controls variation in a population?. Most characteristics are controlled by multiple genes. Any character that shows a gradation from one extreme found in the population to the other is called . Drosophila . pseudoobscura. species group. Mohamed A. F. Noor. Duke University. EVOLUTION:. Two fundamental processes. Change within . lineages (adaptation important). Form new lineages . (speciation important). Key Concepts. Asexual and sexual reproduction. Inheritance. Learning outcomes. Distinguish between asexual and sexual reproduction and describe examples of each type of reproduction.. Describe types of variations found within a species and determine whether they are discrete or continuous.. Parents. Progeny (children). A. B. C. 1. 2. 3. Parents. Progeny (children). A. B. C. 1. 2. 3. Johnny Ball. Zoe Ball. Parents. Progeny (children). A. B. C. 1. 2. 3. John Lennon. Julian Lennon. Parents. Define the term variation.. Discuss the fact that variation occurs within, as well as between, species.. Describe the differences between continuous and discontinuous variation, using examples of a range of characteristics found in plants, animals and other organisms.. Morrow et al Genetic differentiation in a loci Allle data are sum- these 9 loci only 2 Malate ples although others Peptidase loci in populations collected mobility Full Locus Allele 0 650 showed some Sexual and asexual reproduction. Reproduction. advantages/disadvantages. Sexual. Asexual. Needs two parents.. Only one parent needed (quicker).. Produces variation in the offspring.. Identical offspring (no variation).. Human variation: defined . Human variation refers to the fact that there are a range of possible values for each of the numerous physical characteristics of human beings.. People of the same species can have differing phenotypic traits that can be related to:. Identify. three examples of inherited characteristics, and three environmental characteristics. Explain. why sound cannot be heard in space. Suggest. some advantages and disadvantages of recycling.