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Unformatted text preview: BIO320 Spring 2010 Midterm 1 Answer Key Blue (0) Orange (1) Red(2) Green (3) 1. A B C A 2. B C A A 3. D B B A 4. C C B D 5. E A D C 6. B E D D 7. E C B B 8. A E E A 9. D A C A 10. C C B E 11. B D C D 12. A B A C 13. C B A A 14. A D B A 15. B D B A 16. E B B C 17. B C E B 18. D A C B 19. D D D A 20. A A E C Short answer: BLUE (0). SA1. a. If flower color is inherited as a single gene ( P ) where one allele is incompletely dominant over the other, then plants with lavender colored plants must be heterozygous ( Pp ) since this is the color observed in F1 and purple and white must be homozygous ( PP and pp , respectively). Therefore the predicted ratios from the F1 monohybrid cross are ¼ PP purple: ½ Pp lavender: ¼ pp white. Given that there are 800 progeny, this means that 200 should be purple, 400 should be lavender and 200 should be white. b. 482. c. 2. d. reject. e. χ 2 calc = 482 > χ 2 table (p = 0.05 2 df) = 5.99. Therefore the differences are not likely due to chance. SA2. a . RNA; b. purine; c. see picture. d. see picture. e. 5’ AGGCTTAGAC 3’ SA3. 1. Autosomes; 2. Interference; 3. Transition; 4. Phosphodiester; 5. Okazaki fragments; 6. Alleles SA4. a. The distribution of flower color in the F2 progeny is 400 purple: 807 pink: 393 white which represents a 1:2:1 ratio. This ratio indicates that flower color is inherited as a single gene with two alleles where purple is incompletely...
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This note was uploaded on 03/28/2011 for the course BIO 320 taught by Professor N/a during the Spring '08 term at SUNY Stony Brook.
- Spring '08