3. What is the function of the cranium in vertebrates? - allows humans to communicate by moving their jaw
- protects important parts of the circulatory system
- acts as part of the network of nerves
- protects a well-developed brain

Which of the following effects does the recessive allele have in an organism which also displays a dominant allele? a. the recessive allele will turn into a dominant allele b. the gene will have a disorder c. the dominant allele will become recessive d. it has no effect