Jennifer's baby brother had infantile tay-sachs disease (tsd), but jennifer did not have the disease. when jennifer grew up and got married, her third child also had infantile tsd. how is this possible?
a.
jennifer and her husband were both carriers of the allele.
b.
jennifer was a carrier of the allele for the disease, and her husband was not.
c.
jennifer's husband was a carrier of the allele for the disease, and jennifer was not.
d.
jennifer's husband had the disease, and jennifer did not have any alleles.

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.