Jen's parents are both brunettes, but Jen was born a natural blonde. This must be due to her parent's ________.
a) phenotypes
b) gene flow
c) recessive genes
d) dominant genes
e) endocasts
Question 2
What is one way to examine the skulls of mammals?
a) cladistics
b) heterocasts
c) homocasts
d) herocasts
e) endocasts