A very large number r of\"mutant\" flies with characteristics that differ from t

Question

A very large number r of"mutant" flies with characteristics that differ from the normal, wild type have been maintained as particular strains that can be purchased from suppliers or obtained from research a superscript"+". The white-eye mutant (w) is one of the earliest Drosophila mutants that were ing the many years that Drosophila has been used as an experimental organism. The mutants are laboratories name with isolated in the laboratory of T. eye color (w+) is brick red e mutant allele is often named, and the wild-type allele for that gene is defined by that . Morgan. Look at the flies under a dissecting microscope. The wild-type oday you will look at 3 different pure-breeding strains of flies. They are in vials numbered 1, 2 and 3 Each group of students will determine the genotype of the flies in each vial by observing whether the flies have the mutant or the wild-type phenotype for each of 2 traits: eye color and wing size or pattern. The mutant wing phenotype we will use will be either "miniature" or "scalloped." See figures at the end of this handout. The symbols for these traits are Wild type Wild-type symbol M Mutation Mutant Symbol Eve color Wing size white miniature scalloped normal m+ sd Wing pattern normal Use this notation in your notes. For example, the genotype of one strain may be "w m+"if it has white eyes and normal wing size. These strains are pure-breeding, that is, flies of a particular strain are homozygous and therefore genetically identical for the characteristic(s) in question. All flies in the same numbered vials have the same genotype, and all vials contain both male and female flies. Each student should identify the phenotypes of 3-4 flies from each vial and the group should determine together the genotypes of flies in vials 1, 2 and 3. A vial of flies may have 0, 1, or 2 of the mutant traits.

Explanation / Answer

Red eyed scallop winged fly would ogg by the notation (strain number)- w+sd.

The table denotes the symbol for each allelle.

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