According to the graph, at what maternal age is the incidence of Down syndrome equal to five times the incidence at age 40?
A) about 29 or 30
B) about 35 or 36
C) about 44 or 45
D) about 46 or 47

Question

According to the graph, at what maternal age is the incidence of Down syndrome equal to five times the incidence at age 40? 
A) about 29 or 30 
B) about 35 or 36 
C) about 44 or 45 
D) about 46 or 47

Quizplus · Accepted Answer

According to the graph, the incidence of Down syndrome at age 40 is approximately 1 in 100. To find the maternal age where the incidence is five times greater than age 40, we need to find the point on the graph where the incidence is 5/100, or 1 in 20. This occurs around age 44-45, which is approximately 5 years after age 40. Therefore, the answer is choice C, about 44 or 45.

According to the Graph, at What Maternal Age Is the Incidence