998BiologyMedium
Trisomy 21 is most common in mothers of the ________ age group.
A15 to 19
B35 to 39
C40 to 45
D20 to 34
Correct answer
C. 40 to 45
Explanation
40 to 45 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.