Trisomy 13, trisomy 18, and trisomy 21 have which in common?
A) Viability is rare.
B) They are considered deletion syndromes.
C) Diagnosis is difficult, time-consuming, and expensive.
D) Diagnosis can be made early, based on physical characteristics.

Question

Quizplus · Accepted Answer

Each of these disorders, trisomy 13, 18, and 21, has unique physical characteristics. A presumptive diagnosis can often be made soon after birth and later confirmed by chromosomal analysis. Children with trisomy 13 and 18 usually have short life expectancies. Trisomy 21 has a variable life expectancy, with 80% of individuals living to age 30 years. Trisomy 13, trisomy 18, and trisomy 21 are not deletion syndromes.

Trisomy 13, Trisomy 18, and Trisomy 21 Have Which in Common