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Dennya4 Dennya4
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6 years ago
Ray has a chromosomal abnormality, caused by an extra chromosome on the 21st pair. This
  abnormality has retarded Ray's mental growth and is called
 
  A) Down syndrome.
  B) Klinefelter's syndrome.
  C) XYY syndrome.
  D) FSH.
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ShaniaanthonyShaniaanthony
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6 years ago
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Dennya4 Author
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6 years ago
This site is awesome
Transonic
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Correct Slight Smile TY
Marcie D
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2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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