Genetic Frequency & Natural Selection Project Golden Girls Plus Alex Media Room B Group Presentation Date: 140523 Presenters: Alex Bentley 288531 Nancy Bocanegra 320379 Cathy Odom 128180 Christina Sechak 300182 Species Evolution Over Many Generations 1
Project Overview • What is gene frequency? • How was this proven by the monk Gregor Mendel through Mendel’s law of segregation ? • What is natural selection? • What did Charles Darwin learn on the ship “The Beagle” in the 1830’s? 2
Gene Frequency (Lab #10 with beads) • What did we do on Lab#10? We mixed different selections of beads, red and white, and performed 6 1. generations of gene mixtures to calculate genotype frequency. We mixed red, white, and black beads to test genotype frequency. 2. We used Excel to test out through 12 generations. 3. Phenotype: the expression of a particular trait, like skin color, height, Genotype: the entire behavior, according to set of genes in an the individual’s organism; a set of genetic makeup and alleles that environment determines the expression of a particular characteristic or trait 3
Natural Selection (Lab#11 with dots) • What did we do in Lab#11? We each placed 20 dots on a patterned mat 1. Victor, our predator , removed dots to simulate 2. natural selection Natural Selection of the Victor, the English “Predator” Peppered Moth in 1800’s Industrial Revolution 4
Natural Selection: Darwinism Probability South American Finches and different beaks on Galapagos Islands Chance Offspring Darwinism Nature Adaption 5
Results: Gene Frequency: two strong genes thrive, survive, and reproduce, and four die off 120.0% +100%M 6 Generations and Projections Through 12th Generation 100.0% 80.0% RR 60.0% Rw P e ww r RB c 40.0% wB e BB n t Linear (RR) 20.0% a Linear (Rw) g Linear (ww) e s Linear (RB) 0.0% Gen 1 Gen 2 Gen 3 Gen 4 Gen 5 Gen 6 Gen 7 Gen 8 Gen 9 Gen 10 Gen 11 Gen 12 Linear (wB) Linear (BB) -20.0% -40.0% -60.0% Generations 6
Mendel’s Law of Independent Assortment Gregor Mendel Dominant Recessive > 4 Traits traits generations 7
Conclusions and Observations • Organisms change with time: EVOLUTION • Thriving = SURVIVING = OFFSPRING • Sexual Selection: MATING Female peafowl Male peacock 8
Gene Frequency & Natural Selection Project Questions, Comments, Concerns? Thank you! Christina, Nancy, Cathy, Alex 9
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