Exam 2 Spring 2008 key

Exam 2 Spring 2008 key - 1 Fill out your scantron answer...

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Fill out your scantron answer sheet : Write in and bubble in your name and PID number. Leave the sequence number blank. You may write on this and YOU MAY KEEP IT! You will only be able to see your score later, so to know how you answered a specific question, keep track of your answers on these sheets too. 1. Suppose that two genes control the weight (gene F) and taste (gene D) of a turkey. A male turkey that is fat and tasty is mated with a female turkey that is also fat and tasty. One hundred baby turkeys hatch. The majority (55) look like the parents. However, 18 are fat and tasteless, 20 are thin and tasty, and 8 are thin and tasteless. Which of the following are the most likely genotypes of the parents? 1) dad is F/F;D/D; mom is f/f;d/d 2) dad is F/F;D/D; mom is F/F;D/D 3) dad is f/f;d/d; mom is F/F;D/D 4) dad is F/f;D/d; mom is F/f;D/d 5) dad is F/F;D/D; mom is F/f;D/d 2. In the figure to the right, the order of these stages is not correctly labeled. When putting these in the correct order, image 4 should come directly AFTER image ____: 1) 1 2) 2 3) 3 4) 5 5) 6 (should be 2- 4-1-6-5-6: IPMATI) 3. In the figure to the right, a ____ cell is dividing into two ____ cells. 1) prokaryotic … genetically different 2) prokaryotic or eukaryotic … genetically identical (except for spontaneous mutations) 3) eukaryotic … genetically different 4) eukaryotic … genetically identical (except for spontaneous mutations) Prokaryotes don’t have nuclei and they don’t go through these distinct stages and they don’t have linear chromsomes. 4. In the image labeled as # 2 to the right, what could be happening? 1) crossing over 2) protein synthesis 3) DNA replication 4) 1, 2, and 3 5) 2 and 3 only 5. Alice is a woman whose father suffers from hemophilia. Alice’s mother’s family has no history of hemophilia. The likelihood that Alice is a carrier of hemophilia is: 1) 100% 2) 67% 3) 50% 4) 25% 5) 0% (Alice cannot be a carrier) 6. The cell shown at right … 1) is undergoing a type of cell division that occurs in skin cells 2) has a diploid number of 8 3) has two pairs of homologous chromosomes 4) 1, 2, and 3 are all correct 5) only 2 and 3 are correct (One little black and one little grey = pair of homologs; one big black and one big grey = pair of homologs; so, n = 2 or 2n = 4) 7. Tim has type AB blood. Dawn does not know her blood type. They have 3 children: one with type AB, one with type B, and one with type A. What could be Dawn’s genotype? 1) I A /I A 2) I A /I B 3) i/i 4) I B /I B 5) more than one choice is possible 8. Which of the following accounts for the variability associated with sexual reproduction? 1) mitotic cell division of the sperm and egg cells 2) crossing over during prophase I of meiosis 3) the spindle pulling apart sister chromatids during anaphase of mitosis 4) cytokinesis 5) all of the above account for the variability associated with sexual reproduction 1
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9. Watson and Crick discovered
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This note was uploaded on 11/05/2008 for the course BIOL 101 taught by Professor Hogan during the Spring '08 term at UNC.

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Exam 2 Spring 2008 key - 1 Fill out your scantron answer...

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