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Bild (Su2.06.q) - M Ordae‘l‘h‘ a ELLE In...

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Unformatted text preview: M Ordae‘l‘h‘ a ELLE) In Q4: (Smrweresstonll 2005\ There are 10 questions on this quiz. Each question is worth 10 points. (1) Natural selection acts on individuals — each individual’s traits affect their survival and reproductive success compared to other individuals. The evolutionary impact of natural selection, however, is only apparent in the changes in a - over time. (5 points) 7’ (2) Compare and contrast microevolution and macroevolution. (10 points) 5K4 M,Mfi (3) What do wemean when we say that an allele is fixed in a gene pool? (5 points) TVAth Warm dWAagm/«NQW BMW (4) Suppose you have a population of wildflowers that has two alleles, CR and Cw. Plants homozygous for the CR allele have red flowers and those homozygous for the Cw allele have white flowers. Heterozygous plants (CR C") have pink flowers. In our population there are 320 plants with red flowers, 160 plants with pink flowers and 20 plants with white flowers, for a total of 500 plants. (15 points total) A. Whatithe-tetal-nanrber of alleles for plant color in this diploid population? 2‘7617/i(L[Z '3“ ‘ V ' , ‘ B. How many alleles in this population are CR and how many are C”? (show your work) 1 : 3usrcic“ =L10CK4M45,69C¥ 1w :Cfic‘” = 160 at we»; , mac“ av 30%“ Oc‘ «mace; , we“ .__.__.a "w @60 Cfiailclc) /bocw dicks _ C. Assuming this population is in Hardy-Weinberg equilibrium, what are the allele frequencies predicted to be in the next generation? if“??? 4% {l l“? :‘ f,- b‘r—t 2 (ost) 4 our-I (I? ”\‘+ DEL =i 3” = 03 F967 14900 1‘02 it, #b ‘\ \ -OK ’0. 7. WW (5) Populations in Hardy-Weinberg equilibrium are exhibiting no genetic change. That is, allele frequencies remain constant over generations. Name four of the conditions for Hardy-Weinberg equilibrium. (20 points) (6) What is the raw material for genetic yanfitjgnl *(Svpgnts)__w_m _,._.—,— ,7...» (7) What is the most important factor in producing the variation that makes adaptation possible? (5 points) “44/ f ' v-7“ XWIMW I} 9" ‘ W \ 7 7’7 \. / , I x,’ ,r ‘u ‘p n / i / 7:, it ‘ 2;;- i V/ BMW (8) What are the three modes of selection that we discussed in class, and how to they change the mean and variance of traits in a population? (15 points) (9) Name and explain two prezygotic barriers and two postzygotic that cause” different species to be reproductiver isolated from each other. (10 points) “:5; 72m, W‘ W‘ Mam“ wave/WW (10) Explain the biological species concept. Is speciation more likely to occur when populations are sympatric (overlapping) or allopatric (separated by a barrier)? Why? (10 points) - - ~ . g4. fl 1 7 173%.“ W Vat!” : i z we” ...
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