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Material Type: Exam; Class: Genetics; Subject: Biology / Biological Sciences; University: SUNY at Albany; Term: Forever 1989;
Typology: Exams
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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
**4. For the following sugar, where would the nitrogen base be attached?
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%