**A Punnett square should be used to find each answer.** 1. What is the chance that their child would have unattached earlobes? ¬¬¬_

2. Beyonce has a straight hairline, which is a recessive trait. Bruno also has a straight hairline. What is the chance that their child would have a widow’s peak? _

3. Beyonce has no dimples (Dd). Bruno has dimples, which is a recessive trait. What is the chance that their child would have dimples? _

4. Beyonce has a cleft chin (CC). Bruno has a smooth chin, which is a recessive trait. What is the chance that their offspring would have a smooth chin? _

5. Beyonce and Bruno are both heterozygous for brown eyes. What is the genotypic ratio for their offspring?

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Archeologists have discovered three sites showing conclusive evidence for the mastery of fire in tanzania, from a period slightly after the time that homo habilis was present in africa. these sites clearly were founded by homo erectus, the descendent species of homo habilis that migrated north, out of africa and into asia. homo erectus was known to have mastered fire, from ample evidence at sites in asia. there is no reason to attribute mastery of fire to homo ergaster, the descendent species of homo habilis that remained in africa.which of the following is an assumption on which the argument depends? (a) before their migration, homo erectus occupied african territory as far south as tanzania.(b) the strain of migration provided the selective pressure motivating homo erectus‘ mastery of fire.(c) homo ergaster would not have derived as much benefit from the mastery of fire as did homo erectus.(d) homo ergaster inherited all cultural knowledge from homo habilis, a species that did not have mastery of fire.(e) homo ergaster did not occupy regions as far south as tanzania until well after the time of these three sites.

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.