practice exam1 - Biology 240W Spring 2005 Exam 1 Version A...

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Biology 240W Spring 2005 Exam 1 – Version A 09 February Name: ______________________________ Userid: ____________________ Page 1 of 7 Remember to FILL IN THE EXAM VERSION AND YOUR STUDENT ID ON YOUR SCANTRON . There are 35 multiple-choice questions, each with one BEST answer. When you complete the exam return the test form and your scantron to you TA. Good luck!!! 1. You are developing a high resolution imaging system to perform non-invasive sex determination for pregnant couples by simply looking for morphological signs of genital development. When you pitch this idea to a venture capital firm, however, they laugh you out of their office when you proclaim your ability to determine the sex of a fetus at 4 weeks of gestation. Why did your presentation garner this response? a. Ovaries are visible at this stage, but testes are not so it would be impossible to definitively determine the sex of the fetus. b. Testes are visible at this stage, but ovaries are not so it would be impossible to definitively determine the sex of the fetus. c. At this stage, the gonads are in a bipotential phase so no sex-specific development has occurred. d. At this stage, gamete production in the gonads has begun, but ova and spermatozoa look the same so it would be impossible to determine the sex of the fetus.
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