Which statement is true of multifactorial disorders? a. They ...

[lilldybug07]

Which statement is true of multifactorial disorders?
 
  a. They may not be evident until later in life.
  b. They are usually present and detectable at birth.
  c. The disorders are characterized by multiple defects.
  d. Secondary defects are rarely associated with them.

Question 2

A baby is born with blood type AB. The father is type A and the mother is type B. The father asks why the baby has a blood type different from that of his parents. The nurse's answer should be based on the knowledge that:
 
  a. Both A and B blood types are dominant.
  b. The baby has a mutation of the parents' blood types.
  c. Type A is recessive and links more easily with type B.
  d. Types A and B are recessive when linked together.

[beccamahon]

Answer to Question 1

B
Multifactorial disorders result from an interaction between a person's genetic susceptibility and environmental conditions that favor development of the defect. They are characteristi-cally present and detectable at birth.
They are usually detectable at birth.
They are usually single isolated defects, although the primary defect may cause secondary defects.
Secondary defects can occur with multifactorial disorders.

Answer to Question 2

A
Types A and B are equally dominant, and the baby can thus inherit one from each parent.
The infant has inherited both blood types from the parents; it is not a mutation.
Both types A and B are equally dominant.
Both types A and B are dominant.

[lilldybug07]

Excellent

[softEldritch]

TYSM