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Warm-up 2/21: Measure the length of your hand in cm.

Warm-up 2/21: Measure the length of your hand in cm. Place ruler up on desk & Stand your hand up. Measure from bottom of palm to tip of tallest finger. Use your phone or a friends phone and enter your results at http://goo.gl/8y4qVA or link on Mr. E’s page Turn in flipbook.

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Warm-up 2/21: Measure the length of your hand in cm.

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  1. Warm-up 2/21: • Measure the length of your hand in cm. • Place ruler up on desk & Stand your hand up. • Measure from bottom of palm to tip of tallest finger. • Use your phone or a friends phone and enter your results at http://goo.gl/8y4qVA • or link on Mr. E’s page • Turn in flipbook. • Study for quiz.

  2. Warm-up 2/21: Part 2 What are the 5 conditions for Hardy-Weinberg genetic equilibrium? DISRUPTING GENETIC EQUILIBRIUM Ch. 16-2 pp. 321-325

  3. Definitions.. • Evolution is the change in a population’s genetic material (alleles) over generations. • A population is in genetic equilibrium if it’s not evolving

  4. WHAT PUSHES A POPULATION OUT OF EQUILIBRIUM? 5 Factors Population is in equilibrium

  5. I. Mutation • Produces and introduces new alleles in a population

  6. II. Migration/ Gene Flow • Movement of individuals in or out of a population • Immigration – In (Entering population) • Emigration – Out (Leaving population)

  7. III. Genetic Drift • The amount of an allele changes due to random events • Affects small populations mostly • Lose alleles if not enough to mate or a catastrophe occurs

  8. IV. Natural Selection (3 Types) • Organisms best suited to their environment live to reproduce and pass on their genes • Acts on a phenotype • Varying types of selection

  9. V. Non-random mating • Can amplify certain traits and reduce others through sexual selection • Sexual Selection - Choose mates based on specific traits and those traits increase in the population

  10. HW: • Due Mon: Read 317-320 Do p320 #1-5 Due Mon • Due Tuesday: Vocab & Read p 321-325 Do problem p 325 #2-5 • Vocab (Tri-fold) for:

  11. Directional Selection Individuals with a more extreme form of trait have higher fitness Normal Distribution Distribution after Selection

  12. Stabilizing Selection Having average form of trait has highest fitness Normal Distribution Distribution after Selection

  13. Disruptive Selection Individuals with any extreme trait has a higher fitness and most likely results in two new species Normal Distribution Distribution after Selection

  14. Warm-up 2/21: Describe what happened with the gene pool with the mice from yesterdays video. (Min. 3 sentences & use as much Vocab as you can.) What are the five assumptions that must hold true to achieve genetic equilibrium? DISRUPTING GENETIC EQUILIBRIUM Ch. 16-2 pp. 321-325

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