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Genetic Frequency & Natural Selection Project

Golden Girls Plus Alex Media Room B GroupPresentation Date: 140523

Presenters: Alex Bentley 288531Nancy Bocanegra 320379Cathy Odom 128180Christina 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.

Genotype: the entire set of genes in an organism; 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

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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

Victor, the “Predator”

Natural Selection of the English

Peppered Moth in 1800’s

Industrial Revolution

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Natural Selection: Darwinism

Darwinism

Probability

Chance

AdaptionNature

Offspring

South American Finches and different

beaks on Galapagos Islands

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

-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

Percentages

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)

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Mendel’s Law of Independent Assortment

> 4 generatio

ns

Recessive traits

Dominant Traits

Gregor Mendel

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Conclusions and Observations

• Organisms change with time: EVOLUTION

• Thriving = SURVIVING = OFFSPRING

• Sexual Selection: MATING

Female peafowl

Male peacock

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Gene Frequency & Natural Selection ProjectQuestions, Comments, Concerns? Thank you! Christina, Nancy, Cathy, Alex