Suppose Ann and her sister are both going to have a baby. Ann is age 28; her sister is age 45. Generalizing from statistics noted in the text, you would know that Ann's probability of having a child with Down syndrome are:
◦ about the same as her sister's
◦ slightly greater than her sister's
◦ slightly less than her sister's
◦ more than 10 times less than her sister's