Which of the following is true of Down's syndrome?
A. It is usually caused by a defect in the sex chromosomes of an individual.
B. The symptoms of Down's syndrome are similar to those of sickle-cell anemia.
C. It is caused by a sexually transmitted infection (STI) during conception.
D. The probability of having a child with Down's syndrome increases with the age of the parents.
Answer: D
You might also like to view...
Which of the following is MOST likely to be a useful thing to say when helping someone who is grieving?
a. "It must have been their time." b. "I know how you feel." c. "Time will heal." d. "This must be painful for you."
One study found that for every hour of playing an educational DVD to your 10-month old they will:
a. increase the words they understand significantly. b. increase the words they understand by 8-16 words. c. decrease the words they understand by 8-16 words. d. decrease the words they understand by over 20 words.
The area of the eye that contains the sensory receptors is the __________.
A. retina B. optic nerve C. lens D. cornea
By ________, infants have become attached to familiar people who have responded to their needs
A) the end of the first month B) two or three months of age C) four months of age D) the second half-year