BIOL139-Midterm2

BIOL139-Midterm2 - Name: ID 9?: For questions 1-30 choose...

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Unformatted text preview: Name: ID 9?: For questions 1-30 choose the best answer 1. to Mendel disproved the idea that for autosomal traits. one parent contributes more to the next generation than another through: :1. test crosses b. back crosses L. reciprocal crosses (1. self crosses all of the above FD Assuming standard genetic notation. which of the following, would represent a test eross involving the two genes indicated ‘2 a. Asbb AL :13 BB b. AaBb x aaBB c. AaBb 5: A313!) (1. 9me xaabb e. AaBb x ath In a cross between two Bb eats where the allele for blaek fur colour (B) is dominant to that specifying brown fur colour (b), what is the probability that any given kitten bom will he a brown female '? a l b 1’2 e. 1:"4 d. 118 e. none of the above A man with blood type A and a woman with blood type B. have a child with blood type This is an example of: a. pleiotropy h. codominance e. incomplete dominance d. recessive cpistasis e. dominant epistasis Name:_ [D #: __ a. Recessive epistasis is indicated by the following; phenomaie ratio for offspring from a dihybrid cross : 12 13:3 c. 13:3:1 and 13:3 6. The genetic ratio 1:2:1 is often associated with: a. complementary gene action b. endominance e. dominant cpistasis d. recessive epistasis e. recessive lethality T. The degree of intensiU' with which a particular genotype is expressed in a phenotype is termed : a. expressivitg.‘ b. penetranee c. pleiotropy d. dominance e. allelism 8. Generally. an allele whose frequency in the population is less than _ _ _ is considered a mutant allele. :1. 0.1% 11. 0. 500 C. 10/0 (.1. 500 e 10% 9. Dominant alleles in humans, which result in terminal conditions. usually manifest themselves: a. in infancy b. in childhood c. in adulthood d. at any age, with equal fi‘equency never, all disease alleles in humans are recessive _(v [-J Name: ID? 10. A colorless precursor in tulips requires the activity of two enzyme; to result in a yellow pigment. Mutant alleles [or either mam»: rank in :1 Eagle of’ooloun The genes encoding those- onzymes are therefore un'olx'ed Ln. 3. b. c. d. C. epistasis pleiotropy complementary gene action oxprossivity a dominance series 11. Duu'ng what stage- of mitosis an: centromorio connections sm-‘erod f‘ il. b. ‘1. d. D. anaphuse meta p11 asc promctaplmsL- prophas: lclophnso 12. Dun'ng what stage of meiotic prophasc I do synaptonemal complexes become visible '3 a. Leptotone b. Zygotene o Paohytenc d Diplotene c. Diakincsis 13. Duling cytoliincsis: a. b. o. d. p.» a contractile ring forms in both animal and plant cells a col] plate. fmms in animal cells and clam-’age furrow forms in plant cells a call plate forms in animal cells and a contractile ring forms in plant cells a contractile ring forms in animal cells and a cell plate forms in plant cells. a contractile ring forms in animal cells and .1 cleavage furrow fotms in plant cells. 14. A trait that affects a stmoturc or process that is found in one so); but not the other, is termed: a. sex—specific b. sex-influonc ed o. sex-linked (u sex-limited X-ljnked J ED 15. The normal Watson—Crick form of DNA is commonly refeITe-d to a." a. A-form b. B-i‘orm e. (“-foml d. W—form Z-form 16. DNA replication occurs during __ phase of the cell cycle a. Go 17. GI C. G: (l. M e. S l7. Three genes, ab and c, lie within close proximity to one another along the «in; chromosome. with b lying in the middle. The distance between a and b is 1!"? 111.11., while the distance from b to c is 15 m.u. If there is 0.1 interference me: in. entire region including the three genes, what would be the rate of double crossovers between a and e. a. 0.135% b. 0.15% c. 1.35 9/0 Cl. 159-13 6. 165% 18. The following is data for offspiing from a testcross: a b e 65 + + + 59 a —- + 890 + b c 82? a 3 -'r 7 + + c 5 a + c I 26 + b + 1 21 Which of the three linked genes. at? ‘o ore is in the middle: 3. a b. h c. c. cl. impossible to deteimine from data provided Name: ID #2 __ 19. Meselson and Stahl relied on the use of in order to d-‘L‘Miwsfi that DNA replication is serniconservative a. E. coli mutants h. cesium chloride gradients c. S. pneumoniae transformation d. ion exchange c. replica plating 2t). rWhich scientist is most closely associated with correlating exposure to a mutager: with the rate of mutation: 3. AH. Smrtevant b. H]. Muller 0. Frederick G’I‘ifi'llll d. Martha Chase e. Oswald ski-"cry 21. UV light is a mutagen that can cause: depurination deamination allq’lation d. thymine dimers er oxidation .0754 22. Unequal crossing over results in: a. an exchange between nonhomologous cln‘ornDsomes b. a transposon c. repair of I.I“\-'-induccd damage (1. a tn'somy 9.. creation of deletions and duplications 23. The genetic code is said to be degenerate because : a. codons can be different in nuclear and mitochondrial DEA b. uracil replaces thymine in RNA c. mutations change the information carried by DNA d. polypeptides undergo post-translational modifications :2. often more than one cotton specifies the same amino acid ...
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BIOL139-Midterm2 - Name: ID 9?: For questions 1-30 choose...

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