Quantitative_Problems

Quantitative_Problems - BLY302 GENETICS ! FALL 2010...

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QUANTITATIVE GENETICS PROBLEM-SOLVING 1. A dark-red strain and a white strain of wheat are crossed and produce an intermediate, medium-red F1. When the F1 plants are interbred, an F2 generation is produced in a ratio of 1 dark-red: 4 medium-dark-red: 6 medium-red: 4 light-red: 1 white. Further crosses reveal that the dark-red and white F2 plants are true breeding. (a) Based on the ratios in the F2 population, how many genes are involved in the production of color? (b) How many additive alleles are needed to produce each possible phenotype? (c) Assign symbols to these alleles and list possible genotypes that give rise to the medium-red and the light-red phenotypes. (d) Predict the outcome of the F1 and F2 generations in a cross between a true- breeding medium-red plant and a white plant. BLY302 GENETICS FALL 2010
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2. An inbred strain of plants has a mean height of 24 cm. A second strain of the same species from a different geographical region also has a mean height of 24 cm. When
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This note was uploaded on 01/05/2011 for the course BLY 302 taught by Professor Unknown during the Fall '10 term at S. Alabama.

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Quantitative_Problems - BLY302 GENETICS ! FALL 2010...

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