There is a sentence fragment that does not express a complete thought.
When scientists sequenced the DNA of domestic cats, they made a startling discovery. A remarkable similarity between the genomes of house cats and those of their feline relatives in the wild.
Here is one way to fix the sentence fragment:
When scientists sequenced the DNA of domestic cats, they made a startling discovery: a remarkable similarity between the genomes of house cats and those of their feline relatives in the wild.
Is there a sentence fragment?
When scientists sequenced the DNA of domestic cats, they made a startling discovery. A remarkable similarity between the genomes of house cats and those of their feline relatives in the wild.
A: yes
B: no