[Answer] In Arabidopsis mutant seedlings lacking MONOPTEROS gene function form cotyledons but lack hypocotyls and roots. The MONOPTEROS gene encodes a regulatory transcription factor whose expression is triggered by the hormone auxin. MONOPTEROS is most analogous to what type of gene from fruit flies?

Answer: segmentation (gap pair-rule or segment polarity)
In Arabidopsis mutant seedlings lacking MONOPTEROS gene function form cotyledons but lack hypocotyls and roots. The MONOPTEROS gene encodes a regulat…

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