Author Question: A young patient has just been diagnosed with xeroderma pigmentosum. When teaching the family about ... (Read 72 times)

nramada · **on:** Jun 25, 2018

A young patient has just been diagnosed with xeroderma pigmentosum. When teaching the family about this disease, the nurse should emphasize which of the following points? Select all that apply.

A)
Wash hands thoroughly when working in the garden to prevent infection.
B)
Wear long sleeves, long pants, gloves, a hat, sunglasses with side shields, and sunscreen while outdoors.
C)
Apply antibacterial ointment to any break in the skin, and cover wounds with bandages.
D)
The best time to allow the child to play outside is in the evening hours after the sun goes down.
E)
The best time for the family to go to the beach is in the fall/winter months.

Question 2

A child possesses a trait that is the result of the interaction of two different genes, neither of which could have produced the trait independently. Which of the following explanations best captures the genetic explanation for this?

A)
The trait is an expression of multiple alleles.
B)
Epistasis has dictated the phenotypic outcome.
C)
The phenomenon is an example of polygenic inheritance.
D)
The outcome is the result of the interaction between collaborative genes.

Expo · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

Ans:
B, D

Feedback:

Xeroderma pigmentosum is a genetic disorder where the enzyme needed to repair sunlight-induced DNA damage is lacking. While washing hands and applying antibacterial products to open wounds are important teaching for parents with children, they are not specific for this disease diagnosis.

Answer to Question 2

Ans:
D

Feedback:

The expression of two genes influencing the same phenotype, neither of which could have produced it alone, is an example of collaborative genes. Multiple alleles involve more than one gene at a particular locus affecting the same trait, and in epistasis, a gene masks the phenotypic effects of another nonallelic gene. Polygenic inheritance involves multiple genes each affecting a small influence on a genetic outcome.