<prompt> In fetus, Deterministic effects due to radiation are less likely to occur below the dose of ?0.50 Gy5 Gy0.005 Gy0.50 rads  <response>: Biological effects of radiation: As exposed dose increases, Threshold dose Effects Deterministic effects Non-stochastic effects Severity of effect increases Yes - For fetus - 0.50 Gy 50 rads - Includes all harmful tissue reactions, excluding stochastic effects. Stochastic effects Frequency of occurrence increases No - Genetic influence, carcinogenesis 