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jjj123456 jjj123456
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6 years ago
What is the most common chromosomal abnormality resulting in birth defects?
 
  a. Down syndrome
  b. Cystic fibrosis
 c. Spina bifida
 d. Autism
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macybri3macybri3
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6 years ago
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jjj123456 Author
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6 years ago
Thanks
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Yesterday
You make an excellent tutor!
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2 hours ago
Correct Slight Smile TY
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