LS1b08 Practice_Exam1_KEY

LS1b08 Practice_Exam1_KEY - ID#______________________...

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

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ID#______________________ Name__ Answer Key ____________________________ TF Name ______________________________ >>>>> Please put your name at the top of each page <<<<< Life Sciences 1b 2008 Practice Exam 1 Keep exam closed until told to begin You will have exactly 1 hour and 20 minutes for the exam. If you finish early, quietly bring your exam to the front of the room & leave. Please stay seated during the last 10 minutes, so that all students may have quiet to finish Turn off cell phones The space provided for each question is sufficient for a complete answer. You may use the back of each page for scratch paper. ------------------------------------------------------------------------------------------------------- The space below is reserved for grading notes. Total __________________ (max. 200) p. 2 LS1b 2008 Practice Exam 1 Name __ Answer Key _________________________ Short answer (11 questions totaling 55 points): Write your answers in the space provided. You may leave your answers as unreduced numerical expressions. 1. autosomal dominant What mode of inheritance is suggested by the following pedigree? Assume that the trait is rare and has complete penetrance. 2. D PKU (phenylketonuria) is a genetic disease resulting from defects in the metabolism of A. Ketones B. Urea C. Molecules containing phenyl groups D. Phenylalanine E. Phenylthiocarbamide F. Homogentisic acid G. None of the above 3. D The malaria parasite infects A. White blood cells and liver cells B. Platelets and red blood cells C. Red blood cells and stem cells D. Red blood cells and liver cells E. None of the above 4. 3/4 At a locus A, there are 4 alleles, A 1 , A 2 , A 3 , and A 4 . In a cross between A 1 A 2 and A 3 A 4 , what is the probability of progeny containing either A 1 , A 3 , or both? 5. 1x1/2x1/2x1x1/2 = 1/8 An individual of genotype AA Bb Cc DD Ee is testcrossed. Assuming that the loci undergo independent assortment, what fraction of the progeny are expected to have the genotype Aa Bb Cc Dd Ee ? 6. ___ 2 _____curly : ___ 1 ____straight In Drosophila , the dominant allele Cy results in curly wings (normal wings are straight), but homozygous Cy/Cy is lethal (the embryos do not survive). In a cross of C y /+ Cy /+, where the + sign denotes the wildtype allele of Cy , what is the expected ratio of curly : straight-wing flies? p. 3 LS1b 2008 Practice Exam 1 Name __ Answer Key _________________________ 7. In a sibship of 7 children, how many different birth orders will result in 3 boys and 4 girls? For example, one such birth order would be BBBGGGG....
View Full Document

Page1 / 9

LS1b08 Practice_Exam1_KEY - ID#______________________...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online