Review the family represented in the pedigree and southern blot below has been evaluated for the presence and distribution of the β s allele. use the information in the southern blot and the explanation provided in the chapter to identify the phenotype and determine the genotype of each person tested.

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.

This is collection of data made by comparing objects in standard units. in science, the units are metric.

The two main stages of cell division are called