Question 1
Having an infant with Down syndrome is more common if __________ is older.
◦ the mother, but not the father,
◦ the father, but not the mother,
◦ more than one sibling
◦ the mother or the father
Question 2
Huntington's disease __________.
◦ can only be passed on if both parents have the allele for the disease
◦ can be passed on if one or the other parent has the allele for the disease
◦ can only be passed on if one parent has begun to show symptoms of the disease
◦ will not be passed on if one parent has the allele for the disease and the other does not