Maricella was born several days ago, and her pediatrician has observed that she has almond-shaped eyes and a fold over her eyelids. In addition, her head, neck, and nose are smaller than other babies of her birth weight. It is most likely that Maricella has an extra _____ chromosome.

Question

Quizplus · Accepted Answer

The presence of almond-shaped eyes, a fold over the eyelids, and smaller head, neck, and nose are characteristic physical features of Down syndrome, which is caused by the presence of an extra copy of chromosome 21.

Maricella Was Born Several Days Ago, and Her Pediatrician Has