Biology / Bio 3373 · Atom · ~20 seconds
Hox Genes and Body-Plan Specification
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Hox genes are a conserved gene family, expressed in chromosomal order, that specify which structures form at each anterior-posterior position, using the transcription-factor regulation Bio 1329 introduces.
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A mutated Hox gene in fruit flies can cause legs to grow where antennae normally form.
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Hox genes specify which structure forms at a position — they do not build that structure's cells themselves.