Describe and explain the characteristic of the first generation (F1) of flies
Virtual Lab 3: Genetics I
| A. Phenotype and genotype of Dragons For fun, you can use this web lab to answer these questions: What genotype(s) result in wings? What genotype(s) result about a brown skinned Dragon? If necessary use your own research to answer the following questions. • Define genotype and phenotype. • What is an allele? B. Drosophila Lab Enter the lab as a guest. You need to purchase a breeding pair of flies. Purchase a female mutant that has a small (vestigial) wing size and a male wild type fly. Breed them and notice the resulting distribution of phenotypes. • Describe and explain the characteristic of the first generation (F1) of flies. Is the vestigial wing characteristic dominant or recessive? • What percentage of the F1 generation would show the recessive characteristic phenotypically according to your table? Are your experimental breeding results consistent with what you expect from this assumption and the logic of the Punnet square? • Breed two of these F1 flies. To do this select a male and a female from the results of your first cross and put them in the breeding jar. Describe and explain the characteristics of the second generation (F2) flies. C. Genetic Disorders Library Describe the three main classes of genetic disorders and give an example of each. Supplemental: Genetic Terminology Glossary Punnett squares: an introduction Alternative Drosophila lab Genetics |