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white, abbreviated w, was the first sex-linked mutation discovered, found in the fruit fly Drosophila melanogaster.In 1910 Thomas Hunt Morgan and Lilian Vaughan Morgan collected a single male white-eyed mutant from a population of Drosophila melanogaster fruit flies, which usually have dark brick red compound eyes.
w: white- Drosophila melanogaster wild type typically expresses a brick red eye color. The white eye mutation in fruit flies is caused due to the absence of two pigments associated with red and brown eye colors; peridines (red) and ommochromes (brown). [65] In January 1910, Thomas Hunt Morgan first discovered the white gene and denoted it as w.
Thomas Hunt Morgan later showed that a new white-eye mutation in Drosophila melanogaster was also sex-linked. He found that a white-eyed male crossed with a red-eyed female produced only red-eyed offspring. However, when they crossed a red-eyed male with a white-eyed female, the male offspring had white eyes while the female offspring had red eyes.
Morgan was born in Lexington, Kentucky, to Charlton Hunt Morgan and Ellen Key Howard Morgan. [3] [4] Part of a line of Southern plantation and slave owners on his father's side, Morgan was a nephew of Confederate General John Hunt Morgan; his great-grandfather John Wesley Hunt had been one of the first millionaires west of the Allegheny Mountains.
Red eyes are our nightmare — both the late-night flight and the eye irritation. We prefer to appear bright-eyed and bushy-tailed , like a Disney princess (preferably Sleeping Beauty, who got ...
Morgan Stanley predicts stocks will face a rough start amid soaring bond yields and a strong dollar. It says the market may get a boost later in the year as Trump's pro-business policies kick in ...
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The irises of human eyes exhibit a wide spectrum of colours. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3]: 9