A male infant was born two days ago, and the nurse assessed the ...

[JMatthes]

A male infant was born two days ago, and the nurse assessed the infant as having single palmar crease, poor muscle tone, and low-set ears. Genetic testing of the infant has been ordered by the physician.
 
  Which statement should the nurse include when explaining this plan to the parents?
  1. We will draw blood from both of you to check for abnormal genes.
  2. Your son will have his chromosomes sampled and then studied.
  3. When your son is 2 years old, he will need a blood test.
  4. After your breast milk is in, we will draw blood from your son.

Question 2

A nurse counsels a couple regarding their concerns about an X-linked disorder. Both parents are carriers of the disorder. They ask the nurse how this disorder will affect any children they might have. What is the nurse's best response?
 
  1. If you have a daughter, she will not be a carrier.
  2. If you have a daughter, she will not be affected.
  3. If you have a son, he will be a carrier.
  4. If you have a son, he will not be affected.

[okolip]

Answer to Question 1

Correct Answer: 2
Rationale 1: The parents' chromosomes do not need to be assessed in order to diagnose the infant.
Rationale 2: A single palmar crease, poor muscle tone, and low-set ears could indicate trisomy 18. This diagnosis is confirmed by chromosomal analysis of the infant, using either a buccal smear or a blood specimen.
Rationale 3: The chromosome studies will be undertaken as soon as possible.
Rationale 4: It is not necessary to wait until the breast milk has come in.

Answer to Question 2

Correct Answer: 2
Rationale 1: Fathers affected with an X-linked disorder cannot pass the disorder to their sons, but all their daughters become carriers of the disorder.
Rationale 2: An X-linked disorder is manifested in a male who carries the abnormal gene on his only X chromosome.
Rationale 3: There is no male-to-male transmission of an X-linked disorder. An X-linked disorder is manifested in a male who carries the abnormal gene on his only X chromosome.
Rationale 4: There is a 50 chance that a carrier mother will pass the abnormal gene to each of her sons, who will thus be affected.

[JMatthes]

Correct answers!

[okolip]

Great! Please up vote