Sally,age 28,recently Married John,age 45

question 7

Multiple Choice

Sally,age 28,recently married John,age 45.They would like to have a child,but they are concerned that they may be at high risk to have a child with a chromosomal abnormality,like Down syndrome,because of John's age.What is their genetic counselor likely to tell them?

• A)They are at higher than average risk for some chromosomal disorders because of John's age,but not for Down syndrome.
• B)They are at higher than average risk for chromosomal disorders of all sorts because of John's age.
• C)There is no relationship between parents' age and chromosomal disorders in their offspring.
• D)The risk of any chromosomal disorder in a child is only related to the mother's age,not to the father's age.

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Definitions:

Atmospheric Pressure

Ambient pressure at sea level equivalent to 14.7 psia, 101.3 kPa, 1 atm, or 1.01 bar.

Psia

Pounds per square inch absolute. Measure of pressure values used in North America that factors in atmospheric pressure of 14.7 psi.

Atmospheric Pressure

The pressure exerted by the weight of the atmosphere, crucial for weather patterns and breathing.

Sea Level

The average level of the surface of the ocean at any given place, used as a standard in calculating land elevation and water depth.