Question
A 42-year-old woman gives birth to a neonate with multiple congenital abnormalities. Physical findings included a flat facial profile, slanted eyes, epicanthal folds, Brushfield spots, short nose, short neck, dysplastic ears, clinodactyly, a large protruding tongue, and a pronounced heart murmur. What is the most common cause of this developmental birth disease?
| A. | Chromosomal deletion |
| B. |
Chromosomal translocation |
| C. |
Expansion of trinucleotide repeat |
| D. |
Nondisjunction |
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