Biology / Unit 13 Bio 3373 short lesson, about 20 seconds
Hox Genes and Body-Plan Specification
Captions available
The idea
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.
In practice
A mutated Hox gene in fruit flies can cause legs to grow where antennae normally form.
Where people slip
Hox genes specify which structure forms at a position — they do not build that structure's cells themselves.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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