Genotype Lab Report

Introduction
The purpose of this lab is to understand how each offspring inherits its genotype and how its phenotype reflects it. Sex chromosomes determine the sex of the offspring, and the autosomes consist of all the other chromosomes that determine phenotypic traits. Dominant traits are the genes that are expressed, while the recessive traits are masked by the dominant traits. We used Drosophila melanogaster (fruit fly), mutating the female fruit fly with a scalloped gene to change the phenotype of its offspring and using males with genes showing wild-type. Placing WT males and SD females in the same vile, we provided the flies an atmosphere to mate, giving us offspring with mixed genotypes and phenotypes. This experiment will reflect the
To set up the reciprocal cross, the mutant gene was given to the male rather than the female from the first experiment and the female received the wild-type.
The first hypothesis stated was that the mode of inheritance for scalloped is autosomal dominant. In this hypothesis the female genotype was homozygous recessive while the male’s was homozygous dominant. The offspring from this cross had heterozygous genotypes and expressed the mutant phenotype. ….
The mode of inheritance for scalloped is autosomal recessive. In this cross, the male parent had a homozygous recessive genotype, while the female had a homozygous dominant genotype. The result of this was that all of the offspring had a heterozygous genotype and expressed the wild type phenotype. …
The mode of inheritance for scalloped is sex linked dominant. In this cross the female parent had a homozygous recessive genotype while the male had a hemizygous dominant genotype. The female offspring from this cross were heterozygous and expressed the mutant phenotype, while the male offspring had a hemizygous recessive genotype and expressed the wild type phenotype.