practice midterm3

practice midterm3 - GENETICS BICD100 Fall 2005 Reinagel...

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GENETICS BICD100 Fall 2005 Reinagel MIDTERM 1 MENDELIAN GENETICS PRACTICE TEST (Note: This practice exam should be used as a general indicator of the types of questions and level of difficulty you might encounter on an exam. Please be aware that you are responsible for all material that was discussed in lecture and on the problem sets, even if it does not appear on this practice exam.) 1. You perform a cross between a long-eared mouse and a short-eared mouse of unknown genotypes. You obtain 12 long-eared mice and 10 short-eared mice in the progeny (F1). You cross the long-eared F1 progeny with one another and you get 77 long-eared mice and 23 short-eared mice in the F2 generation. cross 1: long-eared mouse X short-eared mouse gives F1: 12 long-eared 10 short-eared cross 2: long-eared F1 X long-eared F1 gives F2: 77 long-eared 23 short-eared a) Using letters of your own choosing, state the most likely genotypes of the original two parents, stating which phenotypes are dominant and using a capital letter for the dominant alleles. b) Based on your answer to part (a), state the expected genotypes of the F1, and in what ratio they should occur c) Based on your answers to parts (a) and (b), state the expected genotypes of the F2 (offspring from cross 2), and in what ratio they should occur d) State the phenotype of each genotype in the F2 and use this to predict the phenotypic ratios in the F2 generation
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GENETICS BICD100 Fall 2005 Reinagel 2. You cross a wingless fly with a normal fly and obtain 23 wingless and 27 normal flies in the F1 progeny. To test your hypothesis about the mode of inheritance you then cross
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This note was uploaded on 10/28/2010 for the course BICD 100 taught by Professor Nehring during the Fall '08 term at UCSD.

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practice midterm3 - GENETICS BICD100 Fall 2005 Reinagel...

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