14. The following table shows the results of a complementation test for eye colo

Question

14. The following table shows the results of a complementation test for eye color mutations in Drosophila. Different mutant strains were crossed to determine if the offispring (FI generation) could grow (+) or not (). A) How many genes are involved and which mutations are in the same gene? B) Assuming no recombination takes place, what are the possible phenotypes of the F2 generation that result from crossing the offipring of the vermillion and carnation mutant strains? Show the chromosomal configuration of this F2 generation. Mutation white gamet ruby vermillion cherry coral apricot buff carnation white garnet ru vermillion cherry oral apricot buff carnation

Explanation / Answer

There are five complementation groups as given below:

1. White, cherry, coral, apricot, buff

2. Ruby

3. Garnet

4. Vermillion

5. Carnation

Hence, there are five genes involved.

B. A cross between vermillion X carnation, assuming that no recombination takes place, can result in the following phenotype: V+ C / V C+ (+ for wildtype, V for vermillion, and C for carnation)

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