Station 1 Put these slips in chronological order. (Also explain the terms in parenthesis) Conditions “right” on early earth. (atmosphere, energy) Polymerization Simple Organic Molecules (Vaporization) ( Give Examples) RNA World Eukaryotic Cells Prokaryotic Cells ( self-replication / ribozymes ) ( membrane folding and Endosymbiosis) ( 2 Domains/ Differences) 1st Membranes (Why would lipids form spheres?) Station 2 a. The allele for a hair pattern called a “widows peak” is dominant over the allele for no widows peak. In a population of 1,000 individuals, 510 show the dominant phenotype, how many individuals would you expect for each genotype if the population was in H.W. equilibrium? b. List the conditions necessary for maintaining H-W Equilibrium. c. Do you think H-W Equilibrium could be maintained for this trait? Explain. Station 3 Match each definition to the correct term and explain an example of each. Temporal Behavioral Mechanical Gametic Isolation Isolation Isolation Isolation Habitat Hybrid Hybrid Hybrid Isolation Inviability Sterility (Infertility) Breakdown Timing of reproduction is not compatible. Offspring do not produce functional gamates. Mating, social, hunting, etc., ways of acting do not match. Offspring are weak- or offspring of offspring are weak/ infertile. Egg and Sperm do not recognize each other. Zygotes do not mature. Organisms do not have access to where each other live. Reproductive anatomy does not match. Station 4 Match each example to the correct term. Mutation Gene Flow Natural Selection Non- Random Mating Genetic Drift ABO blood groups give evidence to human migration patterns. Historically horses were smaller, but as the environment changes and conditions grew dryer (food more scarce) horses with longer legs are found in the fossil record. (Note! How did the horses get longer legs?) A high degree of albinism exists among Hopi Indians compared with other tribes in the area. A change in a gene results in a new An earthquake wipes out the salamanders variety of color in wildflowers. This on one side of a mt. pond. The resulting population has a change in gene variation may/or may not become an frequency of size of salamanders. (Used adaption. to be 50% small and 50% large. Now more small ones remain) Station 5 What do the following have to do with evolution? a) Wallace b) Biogeography c) Stabilizing Natural Selection d) Fossils e) Sexual dimorphism Station 6 Make and fill in the following chart. Type of Evolution Divergent Adaptive Radiation Convergent Explanation Example Conditions necessary in environment. Station 7 Once upon a time there was a bunch of bats in a cave in Missouri. These bats were either black or gray in color. These bats would mate with each other and produce offspring that could produce their own offspring. 1. Are the black and gray bats different species? 2. What events would have to happen in order for these bats to become two distinct species? In this population of black and grey bats would mate with each other and a scientist discovered that the black allele was recessive. It was also found that being black was more advantageous because the bats predators could not see the black ones as easily? 3. Do you think these bats will be in Hardy-Weinberg Equilibrium? 4. What condition is not being met in this scenario? In this population of black and gray bats, the black allele is recessive. As the scientist continued, they counted the number of black bats and found it to be 45% of the population. 5. What percentage of dominant alleles are present in the population? Station 8 The scientists continued on their study of the black and grey bats by going to another cave. This new cave had some different bats that had a variety of sizes and had a larger variety of colors. The scientists took specimens of the bats from the original cave and from the newly discovered cave and found that these bats shared the protein named prestin. This protein helps the bats with their sonar capabilities. Interestingly enough, dolphins also share this protein and use it for the same purpose. It was found that the amino acid sequence was different in each of the species. The following chart shows the differences: Organism White Bat Newly Discovered Bats Dolphins # of differences in amino acid sequences between Black / Grey bats and the organism 3 7 30 1. Draw the phylogenetic Tree above and place the organism’s on the phylogenic tree according to the differences in the amino acid sequences. 2. Are the white or the newly discovered bats more closely related to the black/gray bats? 3. What does the fact that dolphins share the protein prestin with the bats tell us? 4. What is one homologous structure that humans and bats share?