ex2_2006 - Name: _ Student ID:_ Page 1 Zoology 470 - Exam...

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Name: ______________________________________ Student ID:________________________ Page 1 Zoology 470 - Exam #2 – 2006 This exam has 5 pages and a total of 50 points . You will have 90 minutes to complete it. Answer all short answer questions as briefly as possible. Make sure your name and ID number are on all pages. You will receive 1 point for doing so. 1. Provide concise definitions for each of the following ( 6 points ) a. Wolffian duct: b. midblastula transition: c. ectoderm: d. contractile ring: e. invagination: f. maskin: 2. Complete the following table referring to cleavage patterns in early embryos of various animals ( 5 points ) Animal Yolk Distribution Completeness of Cleavage Orientation of cleavages Squid (cephalod mollusk) meroblastic Chimpanzee (mammal) rotational Earthworm (annelid) isolecithal holoblastic Salamander (amphibian) Turtle (reptile) discoidal
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Name: ______________________________________ Student ID:________________________ Page 2 3. Circle true (T) or false (F) for each of the following ( 7 points ) T F Androgen insensitivity syndrome occurs in individuals who are genetically XY but who cannot make testosterone T F Protein gradients as a patterning mechanism are possible in Drosophila because the early embryo is syncytial T F oskar would be expected to be a zygotically acting gene, since it encodes a gene product required for germ cell formation in Drosophila embryos T F Genes can be transcriptionally regulated or translationally regulated, but not both T F Presumptive endodermal cells in C. elegans are internalized via convergent extension T F Transcription factors can increase or decrease the rate of transcription of the genes they regulate T F Testosterone is made in both male and female mammals T F Normal zebrafish primordial germ cells placed into an embryo lacking the function of the chemokine, SDF-1, would be expected to migrate normally into the gonadal ridge T F Drosophila sex determination involves production of sex-specific alternatively spliced gene products T F Removing the RNA polymerase binding site from the even-skipped gene would not be
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This note was uploaded on 04/07/2009 for the course ZOO 470 taught by Professor Hardin during the Spring '08 term at Wisconsin.

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ex2_2006 - Name: _ Student ID:_ Page 1 Zoology 470 - Exam...

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