Which dose descriptor is used to estimate hereditary genetic risk at the population level?

Which dose descriptor is used to estimate hereditary genetic risk at the population level?

• A. Genetically significant dose
• B. Mean marrow dose
• C. Entrance skin dose
• D. ALARA

Answer: (A)

Genetically significant dose is the dose descriptor used to estimate hereditary genetic risk at the population level. It represents the gonadal dose—i.e., the radiation dose to reproductive organs—weighted by the population’s age and sex structure to reflect the potential genetic effects in future generations. This makes it a measure of heritable risk across a whole population, not just the risk to an individual. The other options don’t serve this purpose. Mean marrow dose targets the dose to bone marrow and relates to somatic effects like leukemia in the irradiated person. Entrance skin dose measures the dose at the skin surface. ALARA is the safety principle to minimize dose, not a descriptor of genetic risk.

Genetically significant dose is the dose descriptor used to estimate hereditary genetic risk at the population level. It represents the gonadal dose—i.e., the radiation dose to reproductive organs—weighted by the population’s age and sex structure to reflect the potential genetic effects in future generations. This makes it a measure of heritable risk across a whole population, not just the risk to an individual.

The other options don’t serve this purpose. Mean marrow dose targets the dose to bone marrow and relates to somatic effects like leukemia in the irradiated person. Entrance skin dose measures the dose at the skin surface. ALARA is the safety principle to minimize dose, not a descriptor of genetic risk.