Exam3VersionBKey - NAME_TA_Lab Section_ Biology 200 EXAM 2...

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NAME___________________________TA_____________Lab Section_______ Biology 200 EXAM 2 Page 1 OF 10 BIOLOGY 200 EXAM 3 Version B Make sure you have 10 pages. PRINT your name & lab info on EACH page. Points will be deducted this time if you don’t do this. ------------------------------------------------------------------------------------------------------------------------------- 1. During fertilization, the calcium wave: A. Starts at the point of sperm entry B. Starts along the entire circumference of the egg and moves to the middle C. Starts in the center of the egg and moves towards the circumference D. Occurs before sperm entry E. Occurs only if the egg has cortical granules 2. You are studying a species of snail whose coiling pattern is maternally derived . In this species, the right hand coiling pattern (D) is dominant to the left hand coiling pattern (d). In your laboratory, there is a tank that contains snails that are hemizygous for the coiling trait (hemizygous is the condition of having only one set of alleles instead of two, and is noted with an minus sign -). One day, you are watching a (D/-) snail embryo, whose mother was D/D, divide under a microscope and you notice that non- disjunction occurs in the first mitotic cleavage division. Specifically, this non-disjunction results in a daughter cell that contains both chromosomes with the dominant D allele. What do you predict this developing embryo will look like after several rounds of cell division? A. All cells in the embryo will make a left-handed coiling pattern B. All cells in the embryo will make a right-handed coiling pattern C. 50% of the cells will make a left-handed coiling pattern D. 50% of the cells will make a right-handed coiling pattern E. None of the cells will make a coiling pattern, resulting in a disorganized cell mass 3. In humans, a human oocyte is defined as a mature egg: A. During the release of the prophase I block B. After fertilization has occurred C. When an oocyte completes meiosis I D. When the cell enters into metaphase II E. None of the above 4. Price et al. work on sperm competition in Drosophila melanogaster showed that when a female mates with 2 males: A. The proportion of offspring fathered by each male is close to 50% B. The sperm from the second male displaces all of the sperm from the first male C. The sperm from the first male fertilizes the majority of the eggs D. Females produce more offspring when there is one male rather than two males E. None of the above
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NAME___________________________TA_____________Lab Section_______ Biology 200 EXAM 2 Page 2 OF 10 5. The image above is a cross-section of a mammalian seminiferous tubule. Which of the following cells is a primary spermatocyte? A.
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This test prep was uploaded on 04/07/2008 for the course BIO 200 taught by Professor Cooper during the Spring '04 term at University of Washington.

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Exam3VersionBKey - NAME_TA_Lab Section_ Biology 200 EXAM 2...

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