AP Biology Day 10.

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Presentation transcript:

AP Biology Day 10

10 minutes Opener Your original population of 200 was hit by a tidal wave and 100 organisms were wiped out, leaving 36 homozygous recessive out of the 100 survivors. If we assume that all individuals were equally likely to be wiped out, how did the tidal wave affect the predicted frequencies of the alleles in the population? Calculate the frequencies for heterozygous and homozygous dominant from the original population. What Hardy-Weinberg condition is this an example of? Q=.6 P=.4 P2=.16 or 16 individuals 2pq=.48

Opener If the frequencies from the original population were 2pq = 42% p2= 9% The new population frequencies q2= 36% 2pq = 48% p2= 16% Did the frequencies change? What do we call this type of evolution? q2= 36% 2pq= 48% p2= 16% Given that the allele freq changed as a result of random chance- microevolution occurred Bottleneck affect: drastic reduction in population size due to random chance. Original population doesn’t represent the new population.

Agenda Talk assessment Pollinate Plants Mating game!!

Assessment The test was graded in 4 parts Chi Squared MC and FRQ Natural Selection MC and FRQ This will be the only test this year I will allow you to reassess on (that is how it is in college! And the AP test) Need to have study guide completed and good notes from the reading done before you can reassess. Reassessment needs to happen by the end of next week

Assessment Scoring Questions?

Mating Rated R

Hardy Weinberg LT I can mathematically model changes in the genetic structure of a population, using the Hardy-Weinberg equation

Hardy-Weinberg Activity You and the class are going to simulate different parts of microevolution. Each person will have a cup with 4 alleles (2 genes) Go around and “mate” with other people in the classroom Record data