Module 1.7. Genetic Disorders
When considering single-gene disorders in genetic counseling, what does the nurse
know to be true? (Select all that apply.)
May be caused by a single gene mutation or defect
May be caused be an enzyme that is produced by the cells
May be caused by an overproduction or underproduction of a gene product
May be caused by defective receptor proteins - answer all of the above
A couple is expecting their second child. They are speaking to a genetic counselor
about X-linked disorders. Which of the following statements made by the counselor best
explains the Punnett square for X-linked disorders in this pregnancy?
Heterozygous female children are usually not affected by an x-linked trait.
Male children are never affected by a recessive x-linked trait.
All female children will be affected by the x- linked trait.
Future generations will not be affected. - answerHeterozygous female children are
usually not affected by an x-linked trait.
Sex-linked disorders are recessive and associated with the X chromosome. In the
female there is a second X chromosome; therefore, heterozygous females (one X from
the female parent and the second from the male parent) rarely exhibit the effects of the
disorder.
The nurse is answering questions from the parents of a newborn who is born with a cleft
palate. Which statement made by the nurse best explains the meaning of a
multifactorial inheritance disorder?
It is caused by a dominant gene.
The disorder is a recessive trait that skips generations.
Is caused by multiple genes and environmental factors.
When considering single-gene disorders in genetic counseling, what does the nurse
know to be true? (Select all that apply.)
May be caused by a single gene mutation or defect
May be caused be an enzyme that is produced by the cells
May be caused by an overproduction or underproduction of a gene product
May be caused by defective receptor proteins - answer all of the above
A couple is expecting their second child. They are speaking to a genetic counselor
about X-linked disorders. Which of the following statements made by the counselor best
explains the Punnett square for X-linked disorders in this pregnancy?
Heterozygous female children are usually not affected by an x-linked trait.
Male children are never affected by a recessive x-linked trait.
All female children will be affected by the x- linked trait.
Future generations will not be affected. - answerHeterozygous female children are
usually not affected by an x-linked trait.
Sex-linked disorders are recessive and associated with the X chromosome. In the
female there is a second X chromosome; therefore, heterozygous females (one X from
the female parent and the second from the male parent) rarely exhibit the effects of the
disorder.
The nurse is answering questions from the parents of a newborn who is born with a cleft
palate. Which statement made by the nurse best explains the meaning of a
multifactorial inheritance disorder?
It is caused by a dominant gene.
The disorder is a recessive trait that skips generations.
Is caused by multiple genes and environmental factors.
