R

Ram Sharma • 193.88K Points
Coach Biology

Q. Down's Syndrome is caused by an extra copy of chromosome number 21. What percent age of off spring produced by an affected mother and a normal father?

  • (A) 100%
  • (B) 75%
  • (C) 50%
  • (D) 25%
  • Correct Answer - Option(D)
  • Views: 265
  • Filed under category Biology

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