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A locus in Australian Bearded Dragons is involved in the production of pigment. When heterozygous parents mate, 75% of the progeny are colored and the rest are albino. Another phenotype concerns the specific colors that are expressed such that when two green bearded dragons mate, 2/3 of the progeny are […]

The maintenance of homeostasis is of major importance to all organ systems in the body and the overall survival of the individual. Explain how homeostasis is the maintenance of a dynamic range of environmental qualities rather than holding the internal environment at a set point. What would be wrong with […]

Phosphorous is required to synthesize the deoxyribonucleoside thriphosphates used in DNA replication. A geneticist grows some E. coli in a medium containing nonradioactive phosphorous for many generations. A sample of the bacteria is then transferred to a medium that contains a radioactive isotope of phosphorous (32P). Samples of the bacteria are removed […]

As a result of single intake of 6.3×10^3 Bq of a radionuclide, a particular organ will receive doses of the 0.2 mGy from a low energy beta particles and 0.05 mGy from the alpha particles during next 50 y.  These are the only radiations emitted and this organ is the […]