Question

If a boy exhibits delayed, abnormal physical growth; heart problems; certain facial characteristics; and intellectual disability, he may be diagnosed with [blank 1], blamable on trisomy of chromosome [blank 2].

options for blanks 1 and 2: 23, down syndrome, 21, muscular dystrophy.

Answer 1

If a boy exhibits delayed, abnormal physical growth; heart problems; certain facial characteristics; and intellectual disability, he may be diagnosed with [Down syndrome], blamable on trisomy of chromosome [21].

Step-by-step explanation:

Down syndrome is a genetic disorder caused by having an extra copy of chromosome 21. It is associated with physical growth delays, mild to moderate intellectual disability, distinctive facial characteristics, congenital heart disease, and a variety of other health problems. In contrast, muscular dystrophy is associated with degeneration of muscle tissue, and is not associated with a trisomy,