Plant breeders studying genes influencing leaf shape in the plant Arabidopsis thaliana identified six independent recessive mutations that resulted in plants that had unusual leaves with serrated rather than smooth edges. The investigators started to perform complementation tests with these mutants, but some of the tests could not be completed because of an accident in the greenhouse. The results of the complementation tests that could be finished are shown in the table that follows.
a. | Exactly what experiment was done to fill in individual boxes in the table with a plus (+) or a minus (−) ? What does + represent? What does − represent? Why are some boxes in the table filled in green? |
b. | Assuming no complications, what do you expect for the results of the complementation tests that were not performed? That is, complete the table by placing a + or a − in each of the blank boxes. |
c. | How many genes are represented among this collection of mutants? Which mutations are in which genes? |
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Chapter 7 Solutions
ND STONY BROOK UNIVERSITY LOOSELEAF GENETICS: FROM GENES TO GENOMES
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