I've heard from native speakers that the definite article "the" is needed in the first sentence below but not the second one:
- Genetic testing predicted all the markings of my cat correctly.
- Select all columns whose title includes the letter A.
I wonder why that is the case. The structure of the above two sentences seems similar. In both cases, we have a plural noun that is followed by a phrase that adds more information about it. ("of my cat" in Example 1 and "whose title includes the letter A" in Example 2.)