Genetic Frequency & Natural Selection Project Golden Girls Plus - - PowerPoint PPT Presentation

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

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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?

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Gene Frequency (Lab #10 with beads)

• What did we do on Lab#10?

1.

We mixed different selections of beads, red and white, and performed 6 generations of gene mixtures to calculate genotype frequency.

2.

We mixed red, white, and black beads to test genotype frequency.

3.

We used Excel to test out through 12 generations.

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Genotype: the entire set of genes in an

• rganism; a set of

alleles that determines the expression of a particular characteristic or trait Phenotype: the expression of a particular trait, like skin color, height, behavior, according to the individual’s genetic makeup and environment

Natural Selection (Lab#11 with dots)

• What did we do in Lab#11?

1.

We each placed 20 dots on a patterned mat

2.

Victor, our predator , removed dots to simulate natural selection

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Victor, the “Predator” Natural Selection of the English Peppered Moth in 1800’s Industrial Revolution

Natural Selection: Darwinism

Darwinism Probability

Chance

Adaption Nature Offspring

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South American Finches and different beaks on Galapagos Islands

Results: Gene Frequency: two strong genes thrive, survive, and reproduce, and four die off

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• 60.0%
• 40.0%
• 20.0%

0.0% 20.0% 40.0% 60.0% 80.0% 100.0% 120.0% Gen 1 Gen 2 Gen 3 Gen 4 Gen 5 Gen 6 Gen 7 Gen 8 Gen 9 Gen 10 Gen 11 Gen 12 P e r c e n t a g e s

Generations

+100%M 6 Generations and Projections Through 12th Generation

RR Rw ww RB wB BB Linear (RR) Linear (Rw) Linear (ww) Linear (RB) Linear (wB) Linear (BB)

Mendel’s Law of Independent Assortment

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> 4 generations Recessive traits Dominant Traits

Gregor Mendel

Conclusions and Observations

• Organisms change with time: EVOLUTION
• Thriving = SURVIVING = OFFSPRING
• Sexual Selection: MATING

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Female peafowl Male peacock

Gene Frequency & Natural Selection Project

Questions, Comments, Concerns? Thank you! Christina, Nancy, Cathy, Alex

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