Biology Forums - Study Force

Down syndrome
  a. is very rare.
  b. is inherited as an X-linked recessive condition.
  c. results in some degree of mental impairment.
  d. individuals have normal life expectancies.
  e. cannot be detected through prenatal diagnosis.

Question 2

In Down syndrome
  a. as the age of the mother increases, the chance of
  the defect occurring in the unborn children
  increases.
  b. the influence of the father on the defect is equal
  to that of the mother.
  c. most embryos abort before complete term.
  d. a person with the defect cannot have a normal
  child.
  e. none of these are true.
 

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