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Answer Posted / satendra choudhary
satellite colonies grow when
selecting colonies resistant to Ampicillin, resistance is
mediated by a
beta-lactamase which destroy the antibiotic: so when the
colonies are big
enough, the neighbouring untransformed cells (they are
alive because Ampi
is a bacteriostatic) can form "micro" colonies around the
transformed
cell on a part of medium with less or no antibiotic.
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