Bio section 
How can an individual whose parents did not have the “fish odor syndrome” trait inherit that trait?
a) Under the circumstances outlined above, the “fish odor syndrome” cannot be inherited.
b) If each parent were a silent carrier of the “fish odor syndrome,” then their offspring would have a 50% chance of having the syndrome.
c) If each parent were a silent carrier of the “fish odor syndrome,” then their offspring would have a 100% chance of having the syndrome.
d) Only one parent needs to pass on the gene in order for the offspring to have the “fish odor syndrome.
e) If each parent were a silent carrier of the “fish odor syndrome,” then their offspring would have a 25% chance of having the syndrome.