What genotype do true-breeding plants bearing green seeds have?
a. aa
b. aA
c. Aa
d. AA
Derived characters are traits that
a. characterize the last common ancestor that a particular collection of species share.
b. evolved after the last common ancestor that a particular collection of species share.
c. are less well suited to the environment than ancestral characters.
d. are more complicated than ancestral characters.
Humans have a nearly insatiable appetite for sugar, fat, and salt because
a. we are in perfect equilibrium with regard to such appetites.
b. these appetites are always adaptive.
c. such appetites were adaptive in ancient environments.
d. these appetites are adaptive in our modern environment.
Heritability is
a. the percentage of a trait determined by environment.
b. the proportion of observed variation due to genetic variation.
c. the extent to which genetic control of a trait is under the influence of selection.
d. the measure of how well genotype matches phenotype.