Which of the following describes the defect that led to the observation of position-effect variegation (PEV) inDrosophila?

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The w+ gene on the X chromosome was moved from a region near the centromere to a telomeric region with constitutive heterochromatin, resulting in the red patches seen.

The w+ gene on the X chromosome was moved to a centromeric region on chromosome 1, resulting in the white patches seen.

The w+ gene on the X chromosome was mutated in the cells closer to the X-rays, whereas the cells farther from the X-rays exhibited less DNA damage and expressed properly. This damage resulted in the red and white patches seen in the flies.

The w+ gene on the X chromosome was moved from a region near the telomere to a centromeric region with constitutive heterochromatin, resulting in the white patches seen.

 

asked May 26, 2013 in Genetics by GeneX ~Top Expert~ (7,947 points)
    

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The w+ gene on the X chromosome was moved from a region near the telomere to a centromeric region with constitutive heterochromatin, resulting in the white patches seen.

 

answered May 26, 2013 by GeneX ~Top Expert~ (7,947 points)

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