The Hawaiian bobtail squid is able to glow from luminescent Vibrio fischeri bacteria held in its light organs. As it swims at night near the ocean surface, it adjusts the amount of light visible to predators below to match the light from the stars and moon. Predators have a hard time seeing the illuminated squid against the night sky. The bacteria glow in response to a molecule that regulates expression of genes involved in light-producing chemical reactions. The regulator controls production of the genes' mRNA. Therefore, the light-producing genes are under____.
transcriptional control

Question

05-12-2022
Biology

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The Hawaiian bobtail squid is able to glow from luminescent Vibrio fischeri bacteria held in its light organs. As it swims at night near the ocean surface, it adjusts the amount of light visible to predators below to match the light from the stars and moon. Predators have a hard time seeing the illuminated squid against the night sky. The bacteria glow in response to a molecule that regulates expression of genes involved in light-producing chemical reactions. The regulator controls production of the genes' mRNA. Therefore, the light-producing genes are under____.
transcriptional control

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BinithaR BinithaR · Answer 1 · 2022-12-09T23:53:35-05:00

The light-producing genes are under transcriptional control

Why do Hawaiian bobtail squids glow?

A bobtail squid's light organ contains a single species of bacterium that emits a bright glow that gives the animal nighttime protection from predators by enabling it to blend with the moonlight below the waves. The species whose genome was recently examined is closely linked to the depicted Euprymna bobtail squid.

These patterns are illuminated by gigas and related squids to produce visual messages that may be clearly seen in the deep, dark ocean. The body glows from thousands of tiny subcutaneous (s.c.) photophores (bioluminescent organs) buried in the muscle tissue, backlighting the pigmentation patterns.

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