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Bio 212 Fall ‘
Exam 1
Your Exam Version is listed after question 12; enter it on side two of the answer sheet in the section designated VERSION (upper left). Also, be sure to enter your name (last name first) and student ID # (including the three zeros) on the answer sheet. Turn in your answer sheet, plus the filled-in last page of the question booklet.
There are 25 questions worth 4 points each. Unless stated otherwise, assume that all upper case letters refer to dominant alleles and lower case letters refer to recessive alleles.
1. The following structure is:
a) Adenine b) Cytosine c) Guanine d) Thymine
2. The following structure is:
a) Adenine b) Cytosine c) Guanine d) Thymine
3. The following structure is:
a) Adenine b) Cytosine c) Guanine d) Thymine
HOCH 2 O
OH
OH
a
b
c
d
e
**4. For the following sugar, where would the nitrogen base be attached?
- Which of the following sequences is the complement of 5'-CCCAAAGGAATTT-3'?** a) 5'-CCCAAAGGAATTT-3' b) 5'-TTTAAGGAAACCC -3' c) 5'-AAATTCCTTTGGG-3' d) 5'-GGGTTTCCTTAAA-3' e) 5'-GGGGCCTTCCCTTT-3' 6. The genetic information carried by the DNA is determined by: a) The three dimensional structure of the DNA molecule. b) The sequence of base pairs in the DNA. c) The length of the DNA molecule. d) The number of strands in the helix. e) The protein that binds to the DNA in chromosomes. 7. The mammalian mitotic chromosomes to the right: a) Represent a karyotype from a haploid cell. b) Are from cells under going mitosis. c) Are from cells undergoing the second division of meiosis. d) Represent the karyotype of a male. e0 Represent the karyotype of unknown sex. 8. A region of a chromosome that is consists of nucleosomes condensed into thick fibers is: a) euchromatin b) heterochromatin c) chromatid d) spindle fiber e) all of the above 9. During the first division of meiosis, homologous chromosomes: a) Pair. b) Share a centromere. c) Segregate to the same cell. d) All of the above are correct. e) None of the above are correct. 10. During the first division of meiosis, sister chromatids: a) Pair. b) Share a centromere. c) Segregate to the same cell. d) All of the above are correct. e) None of the above are correct. 11. For the cross AaBbCcDdEe x aaBbCcddee in which all five genes assort independently, what fraction of the progeny will have the genotype AaBbCcddee? a) 1/1024 (0.001) b) 1/256 (0.0039) c) 1/32 (0.031) d) 1/4 e) None of the above
18. A mammal with extremely long eyelashes was found in the wild. When crossed with a normal animal, ½ the progeny has long eyelashes and ½ had normal lashes. When the long-lashed progeny were interbred, 2/3 of their progeny had long lashes and 1/3 had normal lashes. The allele that causes long lashes is: a) Sex-linked. b) Co-dominant. c) Lethal in the homozygous state. d) Incompletely penetrant. e) None of the above explain this phenomenon. 19. In the cross NnPp by NnPp, the phenotypes of the progeny are: 2,700 NP, 900 nP, 900 Np, and 300 np. These genes are: a) Linked. b) Unlinked c) On different chromosomes d) a and c are correct e) b and c are correct 20. A three point cross was performed between a heterozygote and a homozygote recessive. The following progeny were obtained: QRT 40 qrt 40 QRt 570 qrT 570 QrT 1,550 qRt 1, Qrt 340 qRT 340 The order of these three genes is: a) QRT b) QTR c) RQT d) These genes are not linked. 21. The distance between Q and R is: a) 7 mu b) 12.2 mu c) 24.4 mu d) 50 mu e) 75.6 mu
The diagram below presents a genetic map with the distance between genes presented in map units. Use this map for the following four questions.
A B C D E F G | 5 | 10 | 25 | 5 | 25 | 30 |
22. The distance between genes A and G is: a) 30 mu b) 50 mu c) 100 mu d) 110 mu e) Cannot be determined. 23. For the cross aC/Ac by ac/ac, the percentage of progeny with the AC phenotype is: a) 0.25% b) 7.5% c) 15% d) 42.5% e) 85% 24. For the cross AF/af by af/af, the percentage of progeny with the Af phenotype is: a) 15% b) 25% c) 35% d) 50% e) 75% 25. For the cross AbC/aBc by abc/abc, what percentage of the progeny would have the ABc phenotype? a) 0.25% b) 0.5% c) 2.25% d) 4.5% e) 22.5%
