geneticsanswerssetII

geneticsanswerssetII - Genetics Problem Set II Answers 1...

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Answers 1. Cross: TtCc x TtCc Expected phenotypic ratio: 9 tall cut = 9/16 = 450 3 tall entire = 3/16 = 150 3 dwarf cut = 3/16 = 150 1 dwarf entire = 1/16 = 50 2. Backcross TtCc to ttcc Expected phenotypic ratio: 1 tall cut = 145.25 1 tall entire = 145.25 1 dwarf cut = 145.25 1 dwarf entire = 145.25 Parentals from q1 were TTCC and ttcc 50% should look like original parentals: tall cut or dwarf entire 50% should be different 3. Cross TtCc x TTCC to get: TTCC = Tall, cut TTCc = Tall, cut TtCC = Tall, cut TtCC = Tall, cut All phenotypes tall, cut. 4 different genotypes (above) in 1:1:1:1 ratio 4. Do a punnet square with X X and X Y. Ratio of male to female offspring is 1:1 5. Boy with hemophilia = X h Y Boy’s mother = X H X h Boy’s father = X H Y 6. X H X H x X h Y Offspring genotypes: 1 X H X h = normal female (carrier) 1 X H Y = normal male 7. Mother must be X G X g for the son to be colorblind 8. X g X g x X G Y Offspring genotypes: 1 X G X g = normal female (carrier)
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This note was uploaded on 04/02/2008 for the course BIO 187 taught by Professor Douglasgreen during the Spring '07 term at ASU.

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geneticsanswerssetII - Genetics Problem Set II Answers 1...

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