An infant who is 4 days postpartum has been diagnosed with a single-gene disorder. The parents of the child have a number of questions about the etiology of the health problem, which the physician is attempting to address in detail
Which of the following teaching points most accurately captures an aspect of single-gene congenital disorders?
A)
Affected genes are present on autosomal chromosomes rather than sex chromosomes.
B)
The majority of single-gene disorders manifest near the time of puberty.
C)
A particular defect can be caused by mutations at several different loci.
D)
Single-gene disorders are associated with existing rather than new mutations.
Ans:
C
Feedback:
A particular defect is not limited to any one specific locus. Single-gene disorders can be present on either autosomal or sex chromosomes, and they are primarily pediatric disorders. They can result from either existing or new mutations.
You might also like to view...
MC Clinical Situation: Janice is a 40-year-old obese client who has just returned from surgery following gastric bypass surgery. She has several medications ordered using the parenteral route
Which of the following routes for administering pain medication is most appropriate for the obese client? A. intramuscular B. intravascular C. subcutaneous D. oral
A boy age 4 years is constantly seeking out and exploring new experiences, and repeatedly asking his parents why-type questions. The boy's behavior suggests that he is successfully navigating an important developmental task within the developmental theory
A) Erikson B) Freud C) Kohlberg D) Fowler
Which of the following renal hormones regulates intrarental blood flow by vasodilation or vasoconstrictions?
a. Renin b. Prostaglandins c. Bradykinins d. Erythropoietin
What conditions in the esophagus lead to esophageal obstruction?
What will be an ideal response?