A Couple Have a Child with Tay-Sachs Disease

question 61

Multiple Choice

A couple have a child with Tay-Sachs disease.What is (are) their genotype(s) ?

• A) both are heterozygous
• B) one is homozgous dominant and the other is homozgous recessive
• C) both are homozygous dominant
• D) both are homozygous recessive
• E) more than one of these is possible

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