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BIOLOGY Monday 27 Feb 2017 Entry Task Explain the two significant patterns of biogeography used by Darwin as evidence for evolution. • Closely related but different - organisms differentiate in slightly different environments. • Distantly related but similar - organisms developed similar adaptations in similar environments. Agenda Housekeeping Genetics as evidence NOVA - The Evolution Lab Housekeeping Cell phone policy. • Posted on the wall. Chpt 16 & 17 scheduled for 9 Mar. • Kahoot review on Wednesday, 8 Mar. Genetics Genetics & Molecular Biology: • Universal genetic code & homologous molecules provide evidence of common descent. • Life’s Common Genetic Code - nearly identical in all organisms. • Homologous Molecules - proteins that are similar in structure & function. p. 470-471 NOVA Evolution Lab NOVA - The Evolution Lab • Grab a computer & log in. • Grab one NOVA Evolution Lab workbook & pass the remainder back. • Wait for further instructions. Note: The NOVA Evolution Lab workbook can be located @ http://www.steilacoom.k12.wa.us/Page/5716 NOVA Evolution Lab NOVA - The Evolution Lab • Create a PBS account (required to save progress) • Link: https://account.pbs.org/accounts/login/ NOVA Evolution Lab NOVA - The Evolution Lab Link: http://www.pbs.org/wgbh/nova/labs/lab/evolution/research#/choo ser NOVA Evolution Lab NOVA - The Evolution Lab • You will need to first log out of the guest user & log in using the log in you created. • We will watch the introduction video as a class & you will answer the introduction questions in your workbook. BIOLOGY Tuesday 28 Feb 2017 Entry Task Grab a computer & log-in. Google “nova evolution” & log-in to continue lab. Agenda Housekeeping NOVA - The Evolution Lab Housekeeping Interested in retaking Exam 7 Chpt 11? Progress reports will be emailed Monday, 6 Mar. • Quarter ends Friday, 31 Mar. Chpt 16 & 17 scheduled for 9 Mar. • Kahoot review on Wednesday, 8 Mar. Teacher training day scheduled for Friday, 10 Mar. • “No School” NOVA Evolution Lab NOVA - The Evolution Lab Link: http://www.pbs.org/wgbh/nova/labs/lab/evolution/research#/choo ser BIOLOGY Wednesday 1 Mar 2017 Entry Task Explain genotype & phenotype. • Genotype = the genetic makeup of an organisms trait. • Phenotype = the physical or observable characteristic of an organisms trait. Agenda Housekeeping Chapter 17 Vocabulary Chapter 17 Workbook Housekeeping Progress reports will be emailed Monday, 6 Mar. • Quarter ends Friday, 31 Mar. Chpt 16 & 17 scheduled for 9 Mar. • Kahoot review on Wednesday, 8 Mar. Teacher training day scheduled for Friday, 10 Mar. • “No School” Chpt 17 Vocabulary Vocabulary to be checked today. • Note: Chpt 17 vocabulary foldable can be located @ http://www.steilacoom.k12.wa.us/Page/5716 Chpt 17 Workbook Complete the chpt 17 workbook: • Will be collected Friday, 3 Mar. • Note: Chpt 17 workbook can be located @ http://www.steilacoom.k12.wa.us/Page/5716 BIOLOGY Thursday 2 Mar 2017 Entry Task How many organisms in the population below? • 35 individuals What is the number of dominant (blk on blk) alleles? • 38 alleles What is the frequency of recessive alleles? • 45 percent 22 22 10 16 Agenda Housekeeping Genes & Variations Housekeeping Progress reports will be emailed Monday, 6 Mar. • Quarter ends Friday, 31 Mar. Chpt 16 & 17 scheduled for 9 Mar. • Kahoot review on Wednesday, 8 Mar. Teacher training day scheduled for Friday, 10 Mar. • “No School” Genes & Variations Genotype: • Genetic makeup; combination of alleles (ex: Bb, Rr). • Cannot be seen. Phenotype: • Physical, physiological, & behavioral characteristics of an organism (ex: brown fur, red petals). • Can be seen. p. 482-483 Genes & Variations Populations: • Group of individuals of the same species that mate & produce offspring. Gene Pool: • All the genes, including different alleles, present in a population. p. 483 Genes & Variations Allele Frequency: • The number of times an allele occurs in a gene pool. p. 483 Frequency Worksheet Grab one and pass it back. Instructions are on the worksheet. BIOLOGY Friday 3 Mar 2017 Entry Task Complete your “Natural Selection & Allele Frequency” worksheet. • When answering the questions you must use complete sentences. Agenda Housekeeping Genes & Variations Housekeeping Progress reports will be emailed Monday, 6 Mar. • Quarter ends Friday, 31 Mar. Chpt 16 & 17 scheduled for 9 Mar. • Kahoot review on Wednesday, 8 Mar. Teacher training day scheduled for Friday, 10 Mar. • “No School” Sources of Variations Mutations • Change in the genetic material. • Some may lower fitness (ability to survive & reproduce) & still others may increase fitness. • How common? Each of us is born with roughly 300 mutations. p. 484 Sources of Variations Genetic Recombination in Sexual Reproduction: • Independent assortment during meiosis. • 23 pairs of chromosomes = 8.4 million gene combinations. • Crossing-over further increases the number of new genotypes. Lateral Gene Transfer: • Exchanging of genes from one organism to another. • Can be of the same species or different species. • Occurs in single-celled organisms (important in the evolution of antibiotic resistant bacteria). p. 484-485 Traits Single Gene Traits • Traits controlled by only one gene. Polygenic Traits • Traits controlled by two or more genes. p. 485-486 Natural Selection Single Gene Traits: • Can lead to changes in allele frequencies. • Leads to changes in phenotype frequency. p. 488 Natural Selection Polygenic Traits: • Affects the relative fitness of phenotypes. Produces one of three types of selection: • Directional Selection • Stabilizing Selection • Disruptive Selection p. 488 Natural Selection Group activity: • Identify a member to read each of the four areas of Natural Selection & Polygenic Traits & one to read Genetic Drift. • You will read your assigned section. • You will then share your information with your group. p. 489-490