Which of the following is true regarding understanding the results of genetic testing?

Outline some of the ways in which genetics is important to all of us.

Nancy Jones is a doctor who specializes in genetic diseases. For many years she has been studying populations of people who have Huntington’s disease. Dr. Jones has a special interest in Huntington’s disease because her mother died of this disease after many years living in a wheelchair. Dr. Jones’s father does not appear to have the disease. She has developed a test that can detect the dominant Huntington’s gene before symptoms appear and she has performed this test on many people. This test involves mapping a person’s genome to determine if the dominant Huntington’s gene is present. Dr. Jones is unsure if she should take the test herself as it will not prevent the disease from developing, only give the person advanced warning of the disease. Nancy Jones has a sister. Draw a pedigree chart that maps the disease through this family. Make sure to indicate those family members that have the disease, those that do not have the disease and those whose status is unknown.  If you were Nancy…

Please help with the following: How does penetrance differ from expressivity in genetics? A. Penetrance is the percentage of individuals with a specific genotype that exhibit the expected phenotype while expressivity is the degree to which a phenotypic character is expressed. B. Penetrance is the degree of lethality of a specific genotype while expressivity is how frequently that genotype is seen in the population. C. Penetrance is the presence of more than two alleles at a locus within a group of individuals while expressivity is the influence of sex on which alleles express themselves. D. None of the above. E. Penetrance refers to the paternal effects of a gene while expressivity refers to the maternal effects of a gene.