ecdysone-mediated polytene chromosome puffing
The decondensing (loosening) and swelling of the chromosomal sites of hormone-responsive genes on polytene chromosomes in response to increased production of the steroid hormone 20-hydroxyecdysone (ecdysone) in Drosophila larvae approaching pupation.
GO:0035079
polytene chromosome puffing
is_a
GO:0071390
cellular response to ecdysone
part_of