Genetic Hierarchy Leading to Segmentation in Drosophila:
Two different sets of genes control embryonic development in Drosophila: maternal-effect genes and zygotic genes. Products of the maternal-effect genes (mRNA and/or proteins) are distributed in a gradient throughout the egg and regulate the expression of the first three groups of zygotic genes (gap, pair-rule, and segment polarity genes).
Complete this flow chart to identify the steps in the pattern formation process in Drosophila.
Drag the labels onto this flow chart. Use blue labels to identify the zygotic genes and pink labels to identify the effects of the genes.
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