Instructions: This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
Input: Later genetic studies strongly supported dogs and gray wolves forming two sister monophyletic clades within the one species, and that the common ancestor of dogs and extant wolves is extinct.
Output:
What indicated dogs and gray wolves developed as two monophyletic clades?