4.18.05exam1_key

# 4.18.05exam1_key - Name LS4 Midterm 1 2005 Circle TA name...

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Name _______________________________ LS4 Midterm 1- 2005 Circle TA name: David Dee Devon Emily Jennifer Kerry Lindsey Nancy Rosemarie Instructions: 1. Before you start, count your pages. The exam should have seven pages including this one. Write your name on each page. 2. Use a black or blue pen. If we cannot read your answer, you will not receive credit. 3 . Show all work! Full and partial credit will only be given for complete answers including calculations. 4. All books, notes and cell phones must be put in zipped backpacks. 5. For all questions, you can assume complete penetrance and expressivity. MC. 24 pts ______ 1. 16 pts ______ 2. 6 pts ______ 3. 12 pts ______ 4. 10 pts ______ Score:___________ 5. 16 pts ______ 6. 16 pts ______ total 100 ______

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Name _______________________________ Multiple choice problems (4 pts each); pick the single best answer for each question. Which law(s) of Mendel are illustrated by the 9:3:3:1 ratio? a. Segregation with one gene b. Segregation with two genes c. Independent assortment with one gene d. Independent assortment with two genes e. Both segregation and independent assortment In the US, 60% of twins are the same sex. What proportion of all twins are monozygotic? a. 10% b. 20% c. 30% d. 40% e. 50% A woman with colorblindness and a man with normal vision had an XXY child with normal color vision. Where did the non-disjunction event occur?
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## This note was uploaded on 07/08/2009 for the course LIFESCI ls 4 taught by Professor Merriam during the Winter '08 term at UCLA.

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4.18.05exam1_key - Name LS4 Midterm 1 2005 Circle TA name...

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