Drosophila Melanogaster Cross Lab Report

We basically said that the bird’s mate has to have the same genes and traits but the mate doesn’t show the mate so I’m assuming that the bird was asexual in the first place. The lab is basically telling us that the bird reproduced by itself but I don’t think that’s how birds work. Overall, I think the lab isn’t that realistic unless if the bird is asexual.

This Punnet Square represents the F1 offspring breeding with each other to create more offspring. This second set of offspring is the F2 generation. If both parents are heterozygous dominant, then the offspring expected would be: 50% heterozygous dominant, 25% homozygous dominant and 25% homozygous recessive.

Apply your understanding of how alleles assort and combine during reproduction to evaluate a scenario involving a monohybrid cross.

Introduction: The intention of this lab was to gain a better understanding of Mendelian genetics and inheritance patterns of the drosophila fruit fly. This was tasked through inspecting phenotypes present in the dihybrid crosses performed on the flies. An experimental virtual fly lab assignment was also used to analyze the inheritance patterns. Specifically, the purpose of our drosophila crosses is to establish which phenotypes are dominant/recessive, if the traits are inherited through autosome or sex chromosomes and whether independent assortment or linkage is responsible for the expressed traits.

We started out with three populations; B, D, and G. In order for us to properly create controlled genetic crosses, we had to ensure that all the female flies were “virgins”.

The motivation of this lab report is to use Mendel’s Laws of Inheritance to analyze and predict the genotypes and phenotypes of an offspring generation (F2) after knowing the genotypes and phenotypes of the parent generation (F1). The hypothesis for this experiment is that the mode of inheritance for the shaven bristle allele in flies is autosomal recessive in both male and female flies.

Now mate a mutant F1 female fly with a mutant F1 male fly. Out of the 50 F2 progeny, what percentage of flies are wild type and what percentage are mutant

11. The progeny of a Drosophila female (heterozygous at three loci: y, ct, and w) crossed to a wild type male are listed below:

Two sepia virgin drosophila females and five, dumpy drosophila are put in a vial containing agar. Nap was used to anesthetize the flies. After a week f1 had laid eggs and f1 pupas were visible. Parents were removed from vial. A week later the drosophila f1 had developed and were analyzed and counted.

Heterozygotes, which have the wild type phenotype, have normal sight which gives them the advantage of finding a mate and have a better success with attracting a mate with their courtship song (Kyriacou et al, 1978). The male heterozygous Drosophila had a better advantage at mating than the homozygotes, which were the ebony, and therefore we predict there will be more wild type by the end of the experiment.

we said goodbye and placed them in the fly morgue. We allowed the F2 larval

For our first generation (F1) of flies we chose to cross apterous (+) females and white-eye (w) males. We predicted that the mutation would be sex linked recessive. So if the female was the sex with the mutation then all females would be wild type heterozygous. Heterozygous is a term used when the two genes for a trait are opposite. The males would all be white eye since they only have one X chromosome. If the males were the sex that had the mutation then all the flies would be wild type but the females would be heterozygous.

The vial was then labeled accordingly with the type of cross (Male Vg, Female W) and the date. The date is important as the Drosophila complete a life cycle within approximately 2 weeks from the mating day. This vial became known as the parent generation or (P).

Introduction: The study of Drosophila has brought great leaps of scientific research with it. As unlikely a candidate they are, studies of Drosophila melanogaster have done much in the way of proving theories, discovering genetically identifiable diseases and much more. Over the past three decades, research on this species has lead researchers to question the developmental processes that Drosophila experience (Bürglin 2016). The embryonic development of Drosophila serves as an important case study for developmental genetics, due to the analogous nature of their embryos cell differentiation. Although Drosophila’s development has very distinct variations when compared to that of vertebrates, there is a commonality between the embryonic development of the nervous system. The similarity between Drosophila and vertebrates gives reason to research the Homeobox genes in order to better understand a multitude of species with homologous development. In particular, the nervous development of Drosophila, could be used to investigate possible cures

Sex allocation refers to the amount of parental resources assigned to male versus female offspring in a sexually reproducing species {Charnov:1982wg, Brunet:1992fg,West:2010ws} and the extent of this allocation in the organism 's fitness. In angiosperms, the flowers are the reproductive organs, but opposite to most animals, the presence of male and female organs varies among species resulting in a large diversity of breeding systems. Those breeding systems are defined on the basis of the presence and fertility of male or female reproductive organs either in the same flower or in the same individual. Then, breeding systems can be categorized as monomorphic, when individuals have both male and female functions (hermaphroditism and