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1. Fly
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INTRODUCTION
Drosophila melanogaster is better known as the fruit fly, and was made an important organism in laboratory research by T. ... Morgan’s research contributed information essential to the entire genome for D. melanogaster being sequenced. So much information is now known about D. melanogaster that it continues to be used to a great extent in biological research, though originally it was only chosen for scientific experiments due to its small size and short life cycle. ...
Around 1908, Morgan began working with D. melanogaster in his lab. ...
In the experiment conducted, wild type male D. melanogaster were crossed with homozygous virgin females that exhibit the white-eyed mutation. ... Our null hypothesis stated that the phenotypic results of the F2 generation would be in a ¼; ¼; ¼; ¼ ratio for each phenotype displayed, which is the outcome expected for this type of X-linked cross.
MATERIALS AND METHODS
D. melanogaster eggs are about half a millimeter long and develop into larva about a day after fertilization. ... One vial contained wild type D. melanogaster, and the second contained D. melanogaster with the white eye mutation. ...
To cross the two strains of D. melanogaster, virgin females were first collected from the white-eyed vial. ... When an X-linked cross is performed with homozygous recessive females, the anticipated phenotypes (red-eyed female, white-eyed female, red-eyed male and white-eyed male) are each expressed as ¼ of the total population counted.
Approximate Word count = 1039
Approximate Pages = 4.2
(250 words per page double spaced)
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