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The abdominal segments ofDrosophilahave no appendages. Loss of function ofbithoraxgenes results in ...

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The abdominal segments ofDrosophilahave no appendages. Loss of function ofbithoraxgenes results in ...

The abdominal segments of Drosophila have no appendages. Loss of function of bithorax genes results in appendages forming in these abdominal segments. Therefore, ________.

▸ bithorax mutations are necessarily recessive

▸ bithorax genes normally activate appendage-forming genes

▸ ultrabithorax usually acts to oppose bithorax genes

▸ bithorax normally activates a gene that negatively regulates appendages in the abdomen

▸ expression of bithorax wild-type genes suppresses all appendage formation

Textbook

Genetic Analysis: An Integrated Approach

Edition: 3^rd

Authors: Sanders, Bowman

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