Which of the following would probably be the least surprising finding from comparing the genomes of
black cottonwood and thale cress?
a. Black cottonwood and thale cress never
shared a common ancestor.
d. Black cottonwood has genes that govern
secondary growth, but these genes are
absent in thale cress.
b. Black cottonwood has genes that influence
membrane transporters, but thale cress
lacks genes that influence membrane
transporters.
e. Black cottonwood has genes for disease
resistance, but thale cress lacks genes for
disease resistance.
c. Black cottonwood and thale cress have
had the same number of gene duplication
events throughout their evolutionary
history.
D
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