Aperson with a genotype of hbss has sickle cell disease. a person with a genotype of hbas allele carries the sickle cell trait. a person with a genotype of hbaa does not have sickle cell disease and does not carry the trait. the punnett square shows the genotype of two people carrying the sickle cell trait.
what are the chances that their offspring will have sickle cell anemia?
0%
25%
50%
100%

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.