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Evolution[1] - From: www.newyorkeFe.com EVOLUTION: ...

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Unformatted text preview: From: www.newyorkeFe.com EVOLUTION: MISCONCEPTIONS AND TRUTHS HAVE YOU NOTICED OUR SON? HE’S DIFFERENT FROM US. HIS FOREHEAD SLOPES LESS, HE ISN’T AS HAIRY AND HE STANDS UP STRAIGHTER. HE’S DIFFERENT FROM ME IN THE SAME WAYS I AM DIFFERENT FROM MY PARENTS. THE CHANGES ARE MINIMAL, BUT UNMISTAKABLE. I GUESS IT’S OBVIOUS WHAT’S HAPPENING HERE. OF COURSE.. THE RIVER GOD IS ANGRY. YOU BETTER START PEEING SOMEWHERE ELSE… From: deadguylives.blogspot.com EVOLUTION: MISCONCEPTIONS AND TRUTHS Explain the misconcepPons about evoluPon shown in the following cartoons using as many of the words below as possible. Each slide is evoking one main idea/theme in evoluPon. You may use any of words as few or as many Pmes as you want. •  MutaPon • Natural SelecPon • ReproducPon •  AdaptaPon • DNA • SpeciaPon •  Genotype • Direct EvoluPonary Evidence • GenePc Dri[ •  Phenotype • MicroevoluPon • Founder Effect •  GenePc Variability • Gene Flow • PopulaPon BoFle Necks •  Non ­random MaPng •  Sexual SelecPon • Random •  Fitness • Non ­random •  DirecPonal SelecPon • Sexual Dimorphism •  Allele Frequency • DifferenPal ReproducPve Success • Survival From: hFp://evoluPon.berkeley.edu/evosite What a show-off! But girl, doesn’t he look fine? www.cartoonstock.com Adapted from: cidutest.wordpress.com Look at the way that guy’s trunk has developed! I would not like to bear his offspring! When it comes to finding a mate, even elephants are picky… Adapted from: www.pleion.blogspot.com www.mordantorange.com hFp://medchrome.com/ YOU ARE THE NEXT CLASS OF DRUG RESISTANT BACTERIA. IF HUMANS CONTINUE TO MISUSE AND ABUSE ANTIBIOTICS, YOUR RANKS WILL SWELL. SO, GO OUT THERE AND MUTATE! AND REMEMBER: THAT WHICH DOES NOT KILL US, MAKES US STRONGER! hFp://www.cspinet.org FROM: OFFTHEMARK.COM Review BIOL 240 (Jan 31st  ­ Feb 4th) •  Hardy ­ Weinberg Equilibrium   EquaPon   AssumpPons •  What causes changes in allele frequencies               Gene Flow MutaPon Non ­Random MaPng (Sexual SelecPon) Natural SelecPon GenePc Dri[ Founder Effect PopulaPon BoFleneck •  Modes of SelecUon         DirecPonal Stabilizing DisrupPve Balancing Hardy ­Weinberg In a populaPon of bugs at equilibrium, the allele for red color is recessive and blue is dominant. Use the Hardy ­Weinberg equaPon to determine the percent of the the populaPon that is heterozygous for blue color. 1. Calculate q2. Count the individuals that are homozygous recessive in the board. Calculate the percent of the total populaPon they represent. This is q2. 2. Find q. Take the square root of q2 to obtain q, the frequency of the recessive allele. 3. Find p. The sum of frequency of both alleles = 100%, p+q = 1. You know q, so what is p, the frequency of the dominant allele? 4. Find 2pq. The frequency of the heterozygotes is represented by 2pq. This gives you the percent of the populaPon that is heterozygous for blue coat. DirecUonal SelecUon  ­ One trait is favored over others  ­ Results in direcPonal changes Examples: arPficial selecPon, anPbioPc resistance and industrial melanism Stabilizing SelecUon  ­Promotes phenotypic uniformity by favoring the average phenotype  ­ Examples: number of offspring per birth in humans and amount of eggs birds lay DisrupUve SelecUon •  Promotes phenotypic differences, favoring the presence of mulPple alleles •  Gene pool may become split into two disPnct gene pools: speciaPon Balancing SelecUon • Maintained by heterosis: when hybrid progeny have higher fitness than either of the parental organisms •  Promotes genePc variability in populaPons • Prevents loss of deleterious alleles •  Sickle Cell Anemia •  People homozygous for the trait (ss) are severely anemic •  Normal people (SS) are suscepPble to malaria •  Heterozygous people are slightly anemic but have the advantage of malaria resistance SelecUon Modes SelecUon Modes ReflecUon #1 Name, secUon and date 1) What was the most interesPng thing you have learned in the past week’s of BIOL or SCI 240 class and why? 2) What confused you the most/ would you like to understand beFer/ talk more about next Pme? Remember, you’ll be graded on your effort to express yourself and not whether or not you are correct/incorrect. ...
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