Exam 1 -- Winter 2006 -- Blank

Exam 1 -- Winter 2006 -- Blank - Bio 305 Genetics Exam#1...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Bio 305 Genetics Exam #1 Special Code: 000000 Winter 2006 February 6, 2006 INSTRUCTIONS 1. For your exam to be scored, you MUST use a #2 pencil. The GSIs have extra if you need one. 2. BEFORE BEGINNING THE EXAM, fill out all information sections on the accompanying answer sheet COMPLETELY. a. Read and follow instructions on the form EXACTLY b. Grid in your NAME, STUDENT ID #, and SPECIAL CODE (Top right corner of this page) on the Left-hand side of the answer sheet. c. Be VERY NEAT and careful when filling out the answer form. The scanning machine is very sensitive and stray pencil marks could be interpreted as answers. 3. Each question has only one BEST answer. 4. Assume genes are unlinked, completely penetrant and expressive UNLESS INDICATED OTHERWISE. 5. When you finish, hand your answer sheet to a GSI PERSONALLY. Do not give it to anyone else to hand in. Only one answer sheet will be accepted from each student. 6. The points for each question are indicated. There are 100 points possible. SUGGESTIONS: Work through exam circling answers on paper copy. When you are finished, review your answers. Only then (or with ~15 minutes of exam time left) should you fill in the scantron answer key. Answering questions based on eliminating options is DANGEROUS. Your best bet is to work out each problem completely before looking at answer choices.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Six samples of cells were taken from an actively dividing population at the points during the cell cycle indicated in the diagram on the left. Sample 1 : middle of G 1 Sample 2 : end of G 1 / beginning S phase Sample 3 : end of S / start of G 2 phase Sample 4 : middle of G 2 phase Sample 5 : end of G 2 / start of M phase Sample 6 : start of G 1 phase. Each sample (1-6) was treated with a chemical that causes the chromosomes to condense as they do naturally during prophase. Pictures were taken of chromosomes from each cell sample. 1. (5 pts) Which samples could the picture above of the X and Y chromosomes have come from? (Choose the ONE answer that encompasses all possible stages) (a) 1 2 3 (b) 2 3 4 (c) 3 4 5 (d) 4 5 6 (e) 6 1 2 (f) 1 2 (g) 2 3 (h) 3 4 (i) 4 5 (j) 5 6 Consider a cross between individuals with the following genotypes: AA Bb CC dd Ee Ff gg x aa bb cc dd ee ff gg, 2. (5 pts) What is the probability of a CHILD with the genotype: Aa bb Cc dd Ee ff gg? S M G 1 G 2
Image of page 2
3 Fill in (a) for TRUE, (b) for FALSE, and (c) for NEED MORE INFORMATION. (1 pt each) 3. Humans, fruit flies, and worms use different mechanisms to inactivate one X chromosome in females. 4. 65% of individuals homozygous for the BRCA1 mutant allele develop some form of breast cancer. The penetrance of this allele is 65%. 5. Adam’s apples are seen most often in men. The gene controlling development of the Adam’s apple is on the X chromosome.
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern