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BIS101 MT1 S07 Key Engebrecht

BIS101 MT1 S07 Key Engebrecht - BIS 101-02(Engebrecht...

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BIS 101-02 (Engebrecht) Name: ______________________________ Spring 2007 Last, First ID #:_______________________________ BIS 101-02 - MIDTERM IA This exam has a total of 100 points. READ THE QUESTIONS CAREFULLY BEFORE YOU ANSWER. SHOW ALL WORK TO GET FULL CREDIT. Please sign your name on the score sheet. This exam has ten pages including this cover page and the score sheet HONOR CODE: My signature below affirms that I wrote this exam in the spirit of the honor system of the University of California, Davis. I neither received nor furnished any “help ” during the exam, nor did I use any unauthorized references. Signature: ______________________________________________________ Good luck Authorization for Public Distribution of Graded Examination I, ______________________________________, ID# _______________________ authorize that after this exam is graded, it can be placed in a holding bin, labeled BIS 101- 02/Engebrecht, on the first floor of Briggs Hall.
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1. (12pts) You have decided to breed rabbits. You know from your BIS101 class that coat color is determined by the C gene, which can have different alleles with the following relationship: full coat color (C) > chinchilla (c ch ) > himalayan (c h ) > albino (c a ). You obtain male and female rabbits of each coat color and perform the following crosses. You score coat color of the progeny. Give all possible genotypes of the breeding parents: a). (2pts) P full coat color x full coat color Cc a x Cc a F1 ± full coat color, 1/4 albino b). (2pts) P1 full coat color x chinchilla Cc a x c ch c a F1 ² full coat color, ³ chinchilla, ³ albino c). (3pts) P1 chinchilla x himalayan c ch c ch x c h c h or c h c a F1 all chinchilla d). (3pts) What cross would you do to determine the genotype of the himalayan rabbit above? Please give cross and all possible outcomes. Cross to the homozygous albino rabbit. If all the progeny are himalayan than it is homozygous for himalayan, but if ± are himalayan and ± are albino, then it is heterozygous c h c a e). (2pts) What type of cross is this? testcross 2. (13pts) The following pedigree is of a family that has cystic fibrosis, an autosomal recessive disease. Assume that individuals marrying into the family do not carry the allele unless there is an offspring that is affected. Roman numerals indicate generation,
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