Agenda Lethal Alleles and Natural Selection Quiz (15) Genetic Drift Do Now + Ppt (15) Genetic Drift Reading (25) Mastery Questions + MC (5) GD vs NS concept.

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Presentation transcript:

Agenda Lethal Alleles and Natural Selection Quiz (15) Genetic Drift Do Now + Ppt (15) Genetic Drift Reading (25) Mastery Questions + MC (5) GD vs NS concept map (10) Is Evolution More than just a Hypothesis? (30)

Evolution Unit Exam

Spring Break Project You WILL have one It will be assigned to you next week Just a heads up!

Genetic Drift Essential Question: Are there other mechanisms of evolution besides natural selection?

Genetic Drift Do Now – p. 34L 1)Why did the population of green beetles die? 2)Does this picture illustrate Charles Darwin’s Theory of Natural Selection? Why or why not?

Is this an example of Evolution by Natural Selection? Put your hand on your head if you think it shows Natural Selection.

Objective Students will explain how genetic drift is when a population changes due to random chance events, and explain the difference between evolution by genetic drift and evolution by natural selection

What is evolution? Evolution occurs when a group of organisms changes over time –Explains how today’s organisms came from ancient organisms

Evolution Can Occur in Two Different Ways Evolution is caused by: –Natural Selection: When a population changes as individuals that are best adapted for the environment survive and reproduce –Genetic Drift: W hen a population changes due to random events.

Natural Selection or Genetic Drift?

Evolution by Genetic Drift Genetic Drift: is a random, non-selective change that changes allele frequency in a population. Let’s break that down… –Genetic: talk about genotypes and alleles –Drift: Randomly changing

Genetic Drift Reading 10 min per page Must have AT LEAST 5 comments/pictures/questions in the margin of each page for a stamp Read for mastery, not speed!

Mastery Questions 1.What is evolution? What are the two ways that evolution can occur? 2. How are natural selection and genetic drift different?

What Do You Know?

Genetic drift produces populations that a.Are more likely to survive because a high degree of variation is created in the population b.Are less likely to survive because the most fit individuals always die c.Are less likely to survive because little variation exists in the population

Is Evolution more than a hypothesis? Read over Evolution Writing Prompt (2) Evidence for Evolution Gallery Walk (10) 2 Corners: Agree/Disagree (2 min) Share with your bio buddy (2 min) WRITE! Is Evolution more than a hypothesis (educated guess)? (14 min)