Question

duplication of a specific segment of the x chromosomes results in the formation of a bar eye in drosophila

Answer 1

True

Duplication is the increase in the number of gene fragment on a given chromosome thereby increasing the gene dosage.

In a normal X chromosome of fruit fly, one copy of 16A gene on both the chromosomes gives rise to red round eyes.

But if the 16A gene undergoes duplication, then the size of the eye decreases resulting in red but bar shaped eyes. The reduction in the size of the eyes is related to the number of duplication. As the number of duplicates will increase the size will decrease.

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