Drosophila Melanogaster Lab Report

Introduction:
Gregor Mendel discovered the basic principle of heredity finished studying one single constant trait. Mendel began his experiments in his tend at the monastery with pea plants; he recognized two primary(prenominal) principles (biography.com). These two principles later became k flatn as Principle of Mendelian Genetics, which is broken into two laws: the Law of Segregation and Law of nonsymbiotic potpourris.

Law of Equal Segregation:
The Law of Segregation is Mendels first law. This law states that a pair of traits separates so that severally gamete receives only one copy of the trait. As research continued, Oscar Hartwig proposed the thinker of light reflex (Wood, 2009), during which a sperm and egg each be set forth half of their genetic material (traits) to their offspring. Each gamete after meiosis has half of their genetic make up from paternal and motherly gametes.

Law of Independent Assortment:
The Law of Independent Assortment states that different gene pairs assort independently in gamete make-up (Griffiths, Wessler, Lewontin & Carroll, 2008). When Mendel only experimented with one trait (monohybrid cross), the result was always a 3:1 ratio between the dominant and recessive trait. Mendel experimented with two traits (dihybrid cross) and observed a 9:3:3:1 ratio.



From this result, Mendel concluded that the traits were independent of one another (Griffiths, Wessler, Lewontin & Carroll, 2008). We now know this ratio of 9:3:3:1 shows that the two genes are unlinked.

In the 1900s, drosophila melanogaster, commonly cognise as the fruit flys became a prize model organism for genetic research. Fruit flies were a choice model because they are small, easy to raise, have minuscule life cycles, and females give rise to hundreds of fertilized eggs. Thomas Morgan studied Drosophila melanogaster during the 1900s and discovered sex linkage and genetic recombination (Griffiths, Wessler, Lewontin & Carroll, 2008). These findings devolve to fruit flies being commonly researched...If you want to get a full essay, order it on our website: Orderessay



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