2011 Unit I Exam-A Spr12 KEY

2011 Unit I Exam-A Spr12 KEY - BSC 2011 UNIT I EXAM - FORM...

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BSC 2011 UNIT I EXAM - FORM A Spring 2012 Name, please: _____ ANSWERS AT THE END _________ DIRECTIONS: Please bubble in the letter of the single best choice for each question on your scantron. Then please write your name on the last page of this exam, tear off that page, and write your essay. 1. Cytoplasmic determinants are coded for by _____. A. segmentation genes B. maternal effect genes C. segment-polarity genes D. pair-rule genes E. gap genes 2. A mutation in a Hox gene would affect what part of a developing embryo? A. where gastrulation begins B. where the primitive streak forms C. what type of appendages form D. where neurulation begins E. formation of the extra-embryonic membranes 3. What might be a possible result if the notochord of an embryo is unable to synthesize inductive signals? A. the dorsal lip would not form B. the blastocoel would not form C. limb buds would not form D. the neural tube would not form E. the amnion would not form 4. What might you expect if bicoid protein is injected into cells at opposite ends of an early fruit-fly embryo? A. an embryo with two neural tubes B. an embryo with no neural tube C. an embryo with two dorsal lips C. an embryo with two ventral sides C. an embryo with two anterior ends 5. A change in ______ expression is one reason why cells ingress in a sea urchin embryo. A. cadherin B. ß-catenin C. sonic hedgehog D. BMP-4 E. thyroxin 6. Which of the following has contributed to large morphological changes as organisms have evolved? A. Hox gene duplication B. heterochrony C. homeobox mutations D. choices A and B only E. choices A, B and C apply 7. What type of embryonic cells most directly assist in the formation of vertebrae? A. dorsal lip cells B. neural tube cells C. somite cells D. grey crescent cells E. neural crest cells 8. Which of the following is correctly paired? A. amnion – circulatory system B. chorion – cushioning C. allantois – cushioning D. chorion – gas exchange E. amnion - food 9. Which is not an example of embryonic cell movement? A. involution B. ingression C. invagination D. convergent extension E. induction 10. The cortical rotation is important for what reason? A. placement of dorsal features C. fertilization envelope formation D. limb bud formation E. placement of anterior features 11. What allows a protein like bicoid to regulate one set of genes in one cell and a different set of genes in another cell? A. the different genes that are in different cells B. a different concentration of bicoid C. a different amount of miRNA 12. What is an important purpose of gastrulation? A. formation of an archenteron B. formation of three germ layers C. formation of the blastocoel 13. Which is not associated with fertilization? A. a cortical rotation
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This note was uploaded on 04/01/2012 for the course BSC BSC2011 taught by Professor Spears during the Spring '10 term at FSU.

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2011 Unit I Exam-A Spr12 KEY - BSC 2011 UNIT I EXAM - FORM...

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