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The nurse recognizes that this greatly increases the couples risk of what health problems?
- A. Diseases that have a multifactorial pattern of inheritance
- B. Diseases with autosomal recessive inheritance
- C. Autosomal dominant disease
- D. X-linked diseases
Correct Answer: B
Rationale: Consanguinity is a major risk factor for autosomal recessive diseases because related individuals share more genes, increasing the likelihood of both parents being carriers. This is less significant for multifactorial, autosomal dominant, or X-linked diseases.
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After the couple receives the results of genetic testing, the nurse should prioritize which of the following?
- A. Secondary illness prevention
- B. Psychosocial support
- C. Gene therapy
- D. Assessing adherence to treatment
Correct Answer: B
Rationale: Following the communication of the findings of genetic testing, it is important that patients receive thoughtful and thorough support to address emotional and psychological impacts. Secondary prevention, gene therapy, or treatment adherence may not be immediately relevant.
To explain this concept adequately, the nurse must understand which of the following?
- A. That personalized medicine is, by definition, holistic
- B. That collaboration is essential in genomic medicine
- C. The ethical basis for genomic medicine
- D. The new technologies and treatments of genetic- and genomic-based health care
Correct Answer: D
Rationale: To meet the challenges of personalized medicine, nurses must understand the new technologies and treatments of genetic- and genomic-based health care. This knowledge is critical for explaining personalized medicine, which tailors treatments based on genetic information, beyond just ethics or collaboration.
Which of the following is the most important factor documented in the patients genetic history?
- A. Three generations of information about the family
- B. Current medications taken
- C. Health problems present in the womans children
- D. Immunizations received for the past three generations
Correct Answer: A
Rationale: A well-documented family history is a tool used by the health care team to make a diagnosis, identify teaching strategies, and establish a pattern of inheritance. The family history should include at least three generations, as well as information about the current and past health status of all family members, including the age of onset of any illnesses and cause of death and age at death. Medications and immunizations are part of the general health history, not specifically the genetic history.
What is the chance that this couple will have a child with six toes?
- A. 25%
- B. 50%
- C. 75%
- D. 100%
Correct Answer: A
Rationale: When two carrier parents have children together, they have a 25% chance of having a child who inherits the gene mutation from each parent and who will have the condition, as in autosomal recessive inheritance. The other percentages are incorrect for this inheritance pattern.
This model for presymptomatic testing is most likely being used to address what disease?
- A. Alzheimers disease
- B. Huntington disease
- C. Tay-Sachs disease
- D. Sickle cell disease
Correct Answer: B
Rationale: Huntington disease has served as the model for presymptomatic testing because the presence of the genetic mutation predicts disease onset and progression. This is not typically the case for Alzheimer's, Tay-Sachs, or sickle cell disease with current testing technologies.