In some cases, people who test positive for
genetic testing can receive preventive
treatments. For example, people who test
positive for the breast cancer genes BRCA1
and BRCA2 can have a preventive
mastectomy (breast removal surgery)
before they develop the disease. In other
cases, no preventive treatments are
available, but frequent monitoring can help
detect a disease earlier, when it's more
easily treated.
What ethical or professional concerns does
a health-care professional need to address
when he or she has a patient who wants to
prematurely treat a genetic disease? Do
you think genetic testing should be part of
normal preventive healthcare? Why or why
not?

Secondary succession would most likely be taking place in a(n)

When water freezes, it . contracts expands

The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.