Exam1F08[1] - Name:_Discussion Section:_...

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Name: ______________________________________________________  Discussion  Section: ____ 2:128 Fundamental Genetics  Exam 1 September 25, 2008 Write or diagram your answers in the space provided.  For genetics problems, show all  your work.  You may get partial credit for an incorrect answer if you do.  The approximate  amount of time to spend on each question is provided in the brackets.  The exam is  worth 90 pts. 1.  [16 min.]  Hobbits are an ancient race of humanlike individuals characterized by small  stature, curly brown hair (on head), and hairy feet.  Like humans, females have two X  chromosomes and males are XY.  Occasionally, hobbits with blonde hair or hairless feet are  born.   These are separate recessive traits and they assort independently.  Suppose that a  female hobbit with brown hair and hairless feet marries a male hobbit with blonde hair and hairy  feet.  They have 10 children of the following sexes and phenotypes.   Males: 3 hairless feet, blonde hair Females:   2 hairy feet, blonde hair 3 hairless feet, brown hair      2 hairy feet, brown hair A. Using  appropriate allele designations, give the genotypes of the two parents. B. Give the genotypes for each of the four different offspring types.  Specify which genotype  gives each phenotype. C. List the possible genotypes of the children of a couple in which the male has brown hair and  hairless feet and the female has blonde hair and hairy feet.  As part of your answer,  consider all possible genotypes for this couple . 1
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D. What genotypes would the parents in C be if they were found to have both male and female  children with both recessive traits (blonde and hairless feet)? 2
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2.  [12 min.]  The drawing below depicts a G1 phase cell from a simple organism with 2 pairs of  homologous chromosomes (2n =4). A.
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This note was uploaded on 11/29/2009 for the course BIOLOGY 2:128 taught by Professor Leicht during the Fall '09 term at University of Iowa.

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Exam1F08[1] - Name:_Discussion Section:_...

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