Is this parallel?

ilovemgmat wrote:-This person, who is hardworking and whose family was killed, is depressed.

(Can 'and' connect 'who' and 'whose'?)

Yes it's correct because who is the subject over here and whose is the object

- The cat which was lost and whose mother is still with us was very cute.

I think the usage of which is wrong over here because which is used for non restrictive clauses and over here was lost is a restrictive clause i.e an information which is necessary therefore, that should be used

(Can 'and' connect 'which' and 'whose' here?. Also, would 'which' be replaced by 'that' as 'cat' is a living thing?)

I would really appreciate you help guys.

saketk wrote:Hi-- I think we can add COMMAS to correct the sentence. The information inside the commas is an additional information about the cat which was very cute..


The cat, which was lost and whose mother is still with us, was very cute

saketk wrote:What I think is that you need to know the context before deciding what's important. A simple sentence would also do.
The cat was very cute. This sentence looks good to me.
Also the one I posted (with commas, also looks good to me)
As far as awkwardness is concerned - I don't think adding 'that' would make the sentence awkward.
'that' and 'whose' are clearly referring to the cat. So, I think both versions are ok.
FYI when we use comma before 'which', it generally means that 'which' is pointing to the nearest noun before the comma.