4. Genetic Mapping and Linkage
Chi Square and Linkage
4:09 minutes
Problem 15a
Textbook Question
Textbook QuestionThree dominant traits of corn seedlings, tunicate seed (T-), glossy appearance (G-), and liguled stem (L-), are studied along with their recessive counterparts, nontunicate (tt), nonglossy (gg), and liguleless (ll). A trihybrid plant with the three dominant traits is crossed to a nontunicate, nonglossy, liguleless plant. Kernels on ears of progeny plants are scored for the traits, with the following results: Phenotype Number Tunicate, glossy, liguled 102 Tunicate, glossy, liguleless 106 Tunicate, nonglossy, liguled 18 Tunicate, nonglossy, liguleless 20 Nontunicate, glossy, liguled 22 Nontunicate, glossy, liguleless 23 Nontunicate, nonglossy, liguled 99 Nontunicate, nonglossy, liguleless 110 500 Could all three genes be carried on the same chromosome? Discuss why or why not.
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