“LAB REPORT FOR GENE LINKAGE AND MAPPING OF WHITE, YELLOW AND SINGED GENES
This paper looks at the study of genetics, we have crossed different genes to try and see how they cross to come up with different genetic makeup. The paper looks at Gregor Mendel who was particularly the first person to study genetics. It is inevitable to mention this distinguished scholar whenever the term genetics comes up. He carried out experiments using plants. The study also looks at Morgan also did experiments with the Drosophila and he came up with answers to questions, which he had on the eye color of these flies.
Genetics is simply a branch of science that deals with the study of heredity and its complex components. Genes are tiny units within cells which make heredity possible (Hand 1). Geneticists study how genes affect the heredity and influence characterization. The study seeks to answer questions to some commonly asked questions. These are questions like, how can parents who have blue eyes give birth to a child with brown eyes? Why are some twins identical while others look remarkably different? How can parents who are tall get a child who is short? Genes influence the development of particular diseases, having a certain height, skin or eye color. This led to the development of science as people sought to get reliable answers to these questions and many others.
Gregor Mendel was particularly the first person to study genetics. It is inevitable to mention this distinguished scholar whenever the term genetics comes up. He carried out experiments using plants. These plants were in a botanical garden at a monastery in Monrovia. Mendel based his study mainly by using peas as his primary source of study. He grew thirty-four different types of peas in a green house to speed up their maturity. He wanted to find out if these peas would always produce true breeds. That is if green peas always produced green peas, and yellow ones yellow peas (Henig, 14). He also wanted to know if tall plants would always produce tall off springs, and dwarf plants the same. He came up with certain laws, which are referred to as Mendelian Laws. The first law is concerned with the segregation of characteristics. This means that for any single pair of characteristics, it is only one of these characteristics can be represented in a gamete. His second law was the law of independent assortment. This meant to explain that for any two characteristics, their genes are inherited independently. One can inherit a certain characteristic from the mother and another from the father. The mendelian rules are very important in genetics and has been applied for many years.
Morgan also did experiments with the Drosophila and he came up with answers to questions, which he had on the eye color of these flies. He crossed a white eyed male with a red eye female. This resulted in red-eyed females and white eyed males in the f1 generation. The f2 generation produced both white and red-eyed males, while all the females remained red eyed. He thus concluded that eye color in the drosophila fly was sex linked. This paper seeks to give a lab report on gene linkage and the mapping of white, yellow and singed genes.
The aim of the experiment carried out was to help in familiarizing with some of the phenotypes commonly used in genetic research of Drosophila melanogaster. The accurate execution of the experiment would lead to a well revelation of genetic composition. The main aim was to test heterozygous whether they have X linked mutation genes. The significance of the study was to determine the difference between the genes and their respective X chromosomes. The main purpose of the report was to aid in preparing a lab report. The hypothesis made here was that crossing over would be observed in both the F1 and the F2 generations.
We carried out the experiment in the following manner:
- Melanogaster males were used in the experiment. The flies in the vial were then anesthetized. 3 white males were then sorted and placed in a new vial.
- Obtain another vial of Canton-S D. melanogaster females was obtained. These were wild type flies. The vial was anesthetized. Three wild type virgin females were selected and placed into the same vial as the 3 white males. The vial labeling was done in the right manner.
- The reciprocal cross was made of white female flies. They were anesthetized as before, and 3 of the virgins placed in a vial. Three wild type males were added to this vial. These were also labeled like before.
- The vials put under cauterized study for a whole.
- Data was then recorded.
- Through the experiment mutant virgin females were the general study basis and all were female.
- The females were then anesthetized. Using a dissecting microscope, it was confirmed that the flies were female and had the triple mutant phenotype.
- Two clean culture vials were obtained, and 3 of the virgins placed in each.
- Wild type males were anesthetized, and three added to each vial of virgins. The vial was labeled as before …”
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