Lect 21 Answers

Lect 21 Answers - 1 Human Gene Mapping Bio Sci 97 Lecture...

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©2003 C. 1 Human Gene Mapping Bio Sci 97 Lecture 21 Dr. Carrie Brachmann Department of Developmental and Cell Biology cbrachma@uci.edu reading lect 22: H& J ch 6.6, 5.3 lect 22 and 23: H& J ch 7
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2 1. A three point test cross was made in Drosophila . All mutant alleles (v verm eyes, cv crossveinless, ct cut wing) are recessive. Study the results. 6pt a. What are the parental genotypes? v cv ct+ and v+ cv+ ct 2pt a. Draw the genetic map for these three loci. Be sure your map indicates map units and the order of the genes relative to each other. You need only draw one of the two possible versions. 21.9 mu 15.1 mu cv__________________v________________ct cv-ct is 37 mu Phenotype of testcross progeny Genotype of gamete from hybrid parent Number of progeny verm eyes, smooth wing w/crossvein v cv + ct + 104 red eyes, cut wing no crossvein v + cv ct 102 verm eyes, smooth wing no crossvein v cv ct + 322 red eyes, cut wing w/crossvein v + cv + ct 321 verm eyes, cut wing no crossvein v cv ct 70 red eyes, smooth wing w/crossvein v + cv + ct + 68 verm eyes, cut wing w/crossvein v cv + ct
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This note was uploaded on 04/15/2008 for the course BIO SCI 98 taught by Professor Goulding during the Spring '08 term at UC Irvine.

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Lect 21 Answers - 1 Human Gene Mapping Bio Sci 97 Lecture...

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