Explain expression of the knirps gene

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4 classes of transcription factor genes that act sequentially to control pattern formation in drosophila: maternal genes (nanos), gap genes (knirps), pair-rule genes (runt), and segment polarity genes (gooseberry). Given the role of each of these classes of genes, predict the effect of the scenarios below on expression levels of each of these gene classes in the embryo described (will expression increase, decrease, or be unaffected). Explain your reasoning.

A. A fly embryo has a mutation that causes increased expression of the knirps gene.

B. A fly embryo has a mutation that blocks the expression of the Nanos gene.

C. A fly embryo has a mutation that decreases the expression of the runt gene.

Reference no: EM132956172

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