A female patient learns that she is the carrier of the X-linked ...

[corkyiscool3328]

A female patient learns that she is the carrier of the X-linked recessive disease hemophilia A. Her spouse is free of the disease. What should the nurse teach the patient about the frequency of this disease in future children?
 
  A) All male children will inherit it.
  B) All female children will be carriers like she is.
  C) All male children will have a 50 risk to inherit the disease.
  D) All female children will have a 50 risk to inherit the disease.

Question 2

What is the most appropriate nursing response to the father of a newborn infant with myelomeningocele who asks about the cause of this condition?
 
  a. One of the parents carries a defective gene that causes myelomeningocele.
  b. A deficiency in folic acid in the father is the most likely cause.
  c. Offspring of parents who have a spinal abnormality are at greater risk for
  myelomeningocele.
  d. There may be no definitive cause identified.

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Answer to Question 1

C
Feedback:
In X-linked recessive diseases such as hemophilia A, females who inherit the affected gene will be heterozygous, and, because a normal gene is also present, the expression of the disease will be blocked. But because males have only one X chromosome, the disease will be manifested in any male children who receive the affected gene from their mother. If the mother has the affected gene on one of her X chromosomes and the father is disease free, the chances are 50 a male child will manifest the disease and 50 a female child will carry the disease gene. All male children will not inherit the disease. All female children will not be a carrier of the disease. Females will not inherit the disease.

Answer to Question 2

D
Feedback
A The exact cause of most cases of neural tube defects is unknown. There may be a
genetic predisposition, but no pattern has been identified.
B Folic acid deficiency in the mother has been linked to neural tube defect.
C There is no evidence that children who have parents with spinal problems are at
greater risk for neural tube defects.
D The etiology of most neural tube defects is unknown in most cases. There may
be a genetic predisposition or a viral origin, and the disorder has been linked to
maternal folic acid deficiency; however, the actual cause has not been
determined.

[corkyiscool3328]

Gracias!

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