The F1 offspring mate with each other in order to produce an F2 generation. This results in sufficient data to determine which trait is dominant or recessive, and if the pattern of inheritance is autosomal or sex-linked. Assignment: You will complete a lab report that includes a title, introduction experimental design, procedure, results, and conclusion. The sections must include the following information. Introduction: Part I: Background information about Drosophila melanogaster ? Information about the structure of Drosophila melanogaster. Information about the life cycle of Drosophila melanogaster. ? Information about sex markers and sex characteristics of Drosophila melanogaster. ? Diagrams of male and female mutant flies. (may include diagrams in experimental design) ? Diagrams of male and female wild type flies. ? Information about laboratory culturing of Drosophila melaongaster. Part II: Genetic applications ? Define: autosomal, sex-linkage, dominant, recessive, incomplete dominance. ? Statement of a rationale: in order to determine patterns of inheritance and support basic genetic rules ?
Statement of purpose: in order to determine patterns of inheritance for the mutant apterous (wingless) strain in fruit flies ? Hypothesis: Predict the % of offspring that will exhibit the dominant and recessive trait in both the F1 generation and F2 generation, based on whether the trait is autosomal or sex-linked. Experimental Design: ? Show phenotypes and genotypes of P1 cross, and then the F1 cross. ? You may include diagrams of fruit flies as part of your experimental design ? List constant conditions for this experiment Procedure: List the steps necessary to set up each cross. ? List the method used to count and record characteristics of fruit flies. ? Important: Tell the dates when each of these steps was completed. Results: ? Create data tables of the numbers of resulting offspring that exhibit the dominant and recessive trait from your cross. Calculate the following ratios (can be expressed as a percentage) F1 offspring: ? Male mutant : female mutant ? male wild type : female wild type ? Male mutant : male wild type ? Female mutant : female wild type Total mutant : total wild type F2 offspring: ? Male mutant : female mutant ? Male wild type : female wild type ? Male mutant : male wild type ? Female mutant : female wild type ? Total mutant : total wild type Conclusion: ? Tell which trait is dominant and which trait is recessive or if the pattern shows incomplete dominance. ? Tell if the trait is sex-linked or autosomal. ? Site your data to explain your reasoning. ? Show Punnett squares for the P1 and F1 crosses. Offer suggestions and recommendations for future study.
The Essay on Widow Bird Female Male Fish
Finding good daycare can certainly pose a problem these days, unless, of course, you " re an African widow bird. When it comes time for a female widow bird to lay her eggs, she simply locates the nest of a nearbyEstrildid finch and surreptitiously drops the eggs inside. That's the last the widow bird ever sees of her offspring. But not to worry, because the Estrildid finch will take devoted care ...
