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In genetics clinic, you are counseling five pregnant women who inquire about their risk for having a Down syndrome fetus. What are their risks and why?a. a 23-year-old mother of a previous trisomy 21 child b. a 41-year-old mother of a previous trisomy 21 child c. a 27-year-old woman whose niece has Downsyndromed. d. a carrier of a 14;21 Robertsonian translocatione. e. a woman whose husband is a carrier of a 14;21Robertsonian translocation
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