practice test 2 - BIOL 230 Genetics Test 2 name Team name...

Info icon This preview shows pages 1–5. Sign up to view the full content.

Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: BIOL 230 Genetics Test 2 name: Team name: When you finish, please sign the pledge (but only if it is truel): “On my honor I pledge that I have neither given nor received any aid on this exam and Iwill not/did not discuss it, directly or indirectly with any other student until after 1: 00 PM today I understand that to do so would constitute a violation of the Xavier University policy on academic honesty and could result In a 0 on this test." ' Basic uestions 50/60 oints.= 1. Here is a simplified cartoon of a cell, given the limitations of drawing in Microsoft Word. This cell is in GZ, so DNA replication has already happened. Now imagine that the cell goes through meiosis. Which of the following shows one cell at the end of meiosis? (3 pts) A @ c 0 .~"‘ 2. Pigeons come in two color patterns, plain or checkered. Examine the results of the following crosses. (10 pts) a. Which trait is dominant? .plain B. checkered C. cannot be determined - b. Give the genotypes for the parents in each cross, using A are or__. Please don’t use P or C. offspring cross lain checkered checkered X plain 40 0 All \ 50 plain X plain 32 0 l4?" t A/ checkered X checkered 0 36 a0. .1 C 0 checkered X plain 15 17 .7 C- x I'l- a I I ! plain X plain 29 10 l” 0, \( HI» 3 1 s 3. A plant of genotype AAdd is crossed to aaDD and an F1 test crossed to aadd. If the genes are unlinked, the percentage of aadd progeny amon the testcross offspring will be . (3 pts) L. INN? / r A. 10 B. 20 C. 25 D. 50 E. 75 I #305 01%“ 4. A plant of genotype AAdd Is crossed to aaDD and an F1 test crossed to aadd If the genes are linked and 20 map ts apart, the percentage of aadd progeny will be . (3 pts) 6:310 B 20 C. 25 D 50 E. 75 2 a? i 7 :;._. _- (TN/1 '— 2.0).; a l F1 Z 0 = :3") (EL/dam A I> a 33 “I; x (I; if; 1 r“W 5. In cats, coat color is controlled by a X-linked ene for which there are two alleles that result in two pigments: black and yellow. Females heterozygous for these alleles have areas of black and areas of yellow in their coat (called tortoise-shell). A tortoise-shell cat has a litter of eight kittens: one yellow male, two black males, two yellow females. and three tortoise-shell females. Assuming there is a single father for the litter, what is his probable color? (3 pts) l @l Z 3 VBUOLD g”. L. ’lori‘oixs S'vvf- \/El10‘:) / 6. Below is a pedigree for Marfan's Syndrome. Affected people are tall and slender with long arms and legs. Tragically, they may suffer from aortic rupture due to abnormal weakening of the connective tissue at the base of the vessel. For example, Olympic volleyball star Flo Hyman died of a ruptured aorta due to Marfan’s Syndrome. (10 pts) Act 610‘ ..--"-- «1 I‘d? X ‘3»! at; 1. “In“; (HE-1.1:: ko‘r'zwry Mn” FLV’VC " *‘ 610k i ’4’; fig aa‘flmfia llaco a. What is the mode of inheritance for this trait? (Assume that it is not common in the general population.) A (jigsaw-.3." ' 5/. 5314‘- Dorflifdrxi'vh,[: b. If the person indicated by the arrow has fraternal twin children, what is the probability that both will have Marfan’s Syndrome? z 5 Z 7. A human geneticist discovered the molecular variation in DNA sequence illustrated in the figures in problem #11 (electrophoresis gels). For the sake of this question (#7), assume the variation is due to an SSR. Outline how PCR could be used to obtain the results. (4 pts) .L 5 ,m . I , ”‘9" SEOJGIMA: apes“; 1902 ‘ / I ,. )30‘9‘1- '1)ng SZ’UM’w Van-w : r/UMIWS .V ,, p . «was so» . m? , I if“ ‘J What m; :N I‘D/magi W _.... ' “.2 '1 Mud owx, ‘ ’ UK S (j (‘1 I, 35 I *2 "“59 ‘I‘Jiw’n-Jr'sze I Y‘ 1 ‘1 )1 / 4a 01“” 0 a I L: hLGm («fifth-ML L 2 8. The following crosses all apply to diploid organisms. You are given the phenotypes of the parental generation and the phenotypic ratio of the F2 generation. You must supply the following information in the blanks: * genotypes of the parental generation (4 pts) * the phenotypic ratio expected for the offspring of a testcross of the F1 For simplicity, use A or a. B or b, etc. F2 (a) P cross Genotypes Phenotypic Testcross of F1: offspring of P organisms ratio phenotypic ratio “a 3,0 X W in: brown brown was 9 red-brownng, ' red—brown x 3 red ,4 bl) " red red red Ami; 3 brownms, " brown F, 1 white an bl) /' white 4"; F2 (b) P cross Genotypes Phenotypic Testcross of F1: offspring of P organisms ratio _ phenotypic ratio albino1 albino 1 4,4- i>b 9 wild type ,4. «g l wild type x 7 albino 3 albino ‘ albin02 albino 2 c2038 I \ 344:2»; 90. ":5 b u: a o ab épisfg; I C” 1" i) {3‘ b 9 3 ___,,,..¥;‘§._E_'.... c_:_.lw-' fl Ob \ I)": bb £0. 8b buds!) (3,710.?) l‘fl-‘vc 15b 3 1 l 9. A com plant known to be heterozygous for three linked genes a, b and c is test-crossed and the progeny phenotypes and numbers of each are: i Z 3 P" 3 Pt (, ’8 f phenotypes numbers W1 l L 3 1+ 5 Total 1000 Mo IOZ m 7 Map these genes. (8 pts) ' A Challenging Questions (10/60 points): Draw appropriate conclusions. 10. A human geneticist discovers the molecular variation in DNA sequence illustrated in the figures here (electrophoresis gels). In the human population at large, she finds any of the four phenotypes shown in panel A. Interested in further investigation, she writes a proposal for a small summer grant. In the proposal, she proposes two hypotheses to explain the variation. (6 pts) A Hypothesis 1: the variation is due to one gene that has three alleles (like human blood types), Hupperbm, H'°werbalnul and h"° ”3"“. Phenotypes observed ' Phenotypes no upper band in population of parents Hypothesis 2: the variation is due to two genes, A“pperband and Blower bandl bnolower band. , a To test her hypotheses, the geneticist proposes an experiment in which she focuses on marriages between parents who have both bands, as seen in panel B. She will look at many such families and tally up the numbers of children with each phenotype. a. Suppose her results show all four types of phenotypes among the children. A :3 35 X pr); 7; g _ W3 7 ,. : c. 813mm): Would such a result support Hypothesis 1? Explain. No. Cum/lose 9,. pr -‘_. '" 0‘: N‘” ”L"? aqrw Twink. amt/{LL {ii [III N9 BANG Would such a result support Hypothesis 2? Explain. \ \ /7 , [A #5. W'P’JSG H a 5 b x I"; 35 ‘3 a b}: c. Suppose Hypothesis 2 is supported and now you want to see if the two genes are linked. Design another (similar) experiment using family data to address this question. ./',” . n “‘37 Liz—‘55? O. 0 bb ‘-/_ [I 1‘ ~ f“. a 1'1”) 5.) 11. The father of Mr. Spock, first officer of the starship Enterprise, came from planet Vulcan; Spock's mother was from Earth. A Vulcan has pointed ears (determined by allele E), adrenals absent (determined by A), and a right-sided heart (determined by H). All these alleles are dominant to normal Earth alleles. The three loci are autosomal, and they are linked as shown: E A H 10 m.u. 20 m.u. If Mr. Spock marries an Earth woman, and there is no genetic interference (although her family may object), what proportion (%) of their offspring will have Vulcan ears and heart but Earth adrenals? (4 pts) S '9ch WOAMN l7 A 1:5 i ,. ' é a m , 56» ,' K C at, K e, at bx, ‘RKLS Z Cchiwfi one). 3 ./ ,I ‘ C ‘2"; E 0k Ll l ’2Lc.zo PMS—ma 6 a i\» ' NDYY‘flT.) , éc‘rLS, £0641” 'rD/‘Arm 74, Vvtx .' ”mac/L,- F: J. 6‘02 A ? ‘7 4 I - g l. / / zoo h ’ a When you finish, please sign the pledge (but only if it is true!): ...
View Full Document

  • Fall '12
  • DorothyB.Engle
  • Genetics

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern