Figure 6.

The time it takes transgenic tadpoles to reach stage 59. Transgenic tadpoles overexpressing xGH and sibling controls were raised in the same tank. Animals must be raised together in the same tank because of the effect of even slight differences in rearing conditions on the rate of tadpole development. We sometimes see this large spread in the time that it takes sibling tadpoles raised together to reach the climax of metamorphosis. This large spread means that the growth conditions were suboptimal, but control and transgenics are affected equally. Each point represents one animal.